Vezalius Bandage is a VTuber active as a member of NIJISANJI EN’s 8th wave, “Krisis”.
Despite his heavy lore as a combat medic wrapped in bandages, he is cheerful and positive on stream, and that gap is a huge part of his charm, isn’t it?
Who is Vezalius Bandage’s past life?
What is his IRL identity’s nationality? Is there any solid proof?
Many of you might be wondering about these details.
We have thoroughly compiled the evidence regarding Issei Kai, who is believed to be Vezalius Bandage’s past life (IRL identity).
From the matching nationalities and activity timelines to the similarities in voice tone and multilingual styles—we carefully explain the points connecting his past life to his current one.
Please read through to the very end.
Who is Vezalius Bandage’s Past Life (IRL Identity)?
First, let’s look at the person considered to be Vezalius Bandage’s past life.
In the VTuber community, Vezalius Bandage’s past life (IRL identity) is widely believed to be Issei Kai.
Of course, this has not been officially announced by NIJISANJI.
However, due to numerous matching points such as voice tone, activity timelines, nationality, and language style, it is recognized as almost certain information among fans.
Nationality and Basic Info of His Past Life, Issei Kai
Issei Kai, who is Vezalius Bandage’s past life, was an indie male VTuber from France.
His channel was created in September 2019, and his activities began around 2020.
He graduated on February 4, 2023.
Issei Kai Basic Profile
| Item | Details |
| Name | Issei Kai |
| Nationality | France |
| Activity Type | Indie Male VTuber |
| Debut Period | Around 2020 (Channel created Sept 2019) |
| Graduation Date | February 4, 2023 |
| Fan Name | Slime-tachi |
| Favorite Food | Katsu Curry |
| Favorite Animals | Cats, Dogs, Shark Whales |
| Lore/Setting | A “Virtual Adventurer” who lost his memory and was transported to another world |
(Source: Virtual YouTuber Wiki – Issei Kai)
His appearance featured short dark blue hair with light blue streaks, and his blue eyes were a defining characteristic.
His consistently positive and cheerful personality, which always brightened up the people around him, was evident throughout his streams.
The fan name “Slime-tachi” really shows off his approachable and friendly personality, doesn’t it?
Past Activities and Friendships of His IRL Identity
In his past life, Issei Kai was active across a wide range of content on Twitch and YouTube, including gaming streams, song covers, and zatsudan (chatting).
Linguistically, his style of naturally mixing French, English, and Japanese was a major characteristic.
He provided streams that were accessible and enjoyable for both French-speaking and Japanese-speaking viewers.
For his song covers, he released numerous Japanese song covers such as “Ai Kotoba I, II, III Mashup,” “KING,” and “Night Journey”.
His affection for Japanese and his motivation to learn the language were strongly reflected in his content.
In 2022, he was temporarily affiliated with a team called “Nebula e-Sports“.
There was a period when he was active alongside members like Ayase Yui and Moff.
Issei Kai’s Main Collaborations & Friendships
- Nebula e-Sports Members: Ayase Yui, Moff
- Singing Collabs: Kino SuzuRin (Ookami wa Akazukin ni Koi wo Shita), Liliana Vampaia (Stay with me), Evalia
- Game Collabs: Ciel Yashiki, Inori Kurohana, Baguette (APEX), Ywuria, Kaheru (Identity V), etc.
- Events: MCM London Comic Con VTuber Panel Appearance
He streamed a wide variety of collaborations within the indie VTuber community, blending international and Japanese creators.
He was also very active in directly interacting with fans on his Discord server, “Slime-tachi.”
Evidence Regarding Vezalius Bandage’s Past Life / IRL Identity
From here, let’s examine the specific evidence pointing to “Past Life = Issei Kai.”
Multiple elements match perfectly, including voice tone, nationality, activity timelines, and hobbies.
The Matching Timelines of Graduation and Debut
The most obvious piece of evidence is the continuity of the activity timeline.
His past life, Issei Kai, graduated on February 4, 2023.
About four months later, on June 24, 2023, he debuted as Vezalius Bandage from NIJISANJI EN.
This interval is an extremely natural timeframe for a VTuber reincarnation.
There is nothing unnatural about the gap between graduation and debut, and it is easily explained as a preparation period.
Comparison of Activity Timelines
| Item | Issei Kai (Past Life) | Vezalius Bandage |
| Start | Around 2020 | June 24, 2023 |
| End/Graduation | February 4, 2023 | Currently Active |
| Gap Period | – | Approx. 4 Months |
Debuting about 4 months after graduating is a very typical timeline for a reincarnation, isn’t it?
Commonalities in Nationality (France) and Multilingual Speaking Style
His past life, Issei Kai, was a male VTuber from France.
Vezalius Bandage is also from France.
This alone is noteworthy, but what’s even more decisive is the way they speak.
Both are trilinguals who can speak French, English, and Japanese.
The style of naturally switching between French, English, and Japanese during streams is very distinctive, and VTubers who stream in this specific multilingual combination are extremely rare.
Furthermore, even their French-accented English and the specific quirks in their Japanese speaking style match perfectly.
The voice tone itself is so similar that people in the community say, “You can tell immediately just by listening.”
Commonalities in Hobbies (Singing, Games) and Personality
The third piece of evidence is the match in hobbies and personality.
Comparison of Past and Current Commonalities
| Item | Issei Kai (Past Life) | Vezalius Bandage |
| Singing | Released many Japanese song covers | Enjoys singing Japanese songs / Karaoke streams |
| Games | Apex Legends, Phasmophobia, etc. | Apex Legends, Monster Hunter, Minecraft, etc. |
| Learning Japanese | Held Japanese study streams for French speakers | Continues Japanese study streams |
| Personality | Cheerful and positive | Cheerful, eccentric, and positive |
| Beliefs | Wants to make people smile | Hero mindset: wants to protect people’s smiles |
Both love singing Japanese songs and are active in learning Japanese.
It’s also hard to ignore that they share a love for specific game genres like Apex Legends.
And the most fundamental similarity is their core mindset of “wanting to make people smile.”
In both his past and current lives, his attitude of wanting to “entertain fans” and “deliver smiles” has remained consistently unwavering.
This shows that it’s not just a coincidence in hobbies, but the very personality of the IRL identity that has carried over.
Hobbies, personality, and beliefs all match—when so much aligns, it’s more natural to consider them the “same person,” right?
Vezalius Bandage’s Nationality and Profile
Vezalius Bandage debuted on June 24, 2023 as a member of NIJISANJI EN’s 8th wave, “Krisis“.
His two genmates are Vantacrow Bringer and Yu Q. Wilson. (Source: Debut Stream)
In his official lore, he is described as a “combat medic who experimented on himself after continuously wishing for people’s salvation.”
The true intent behind his eccentric obsession with healing is said to be hidden beneath his bandages.
His debut tagline (motto) is “You need to be hurt in order to be healed.“
It’s a very deep and cool line. (Source: NIJISANJI EN Official Vezalius Bandage)
| Item | Details |
| Affiliation | NIJISANJI EN “Krisis” |
| Debut Date | June 24, 2023 |
| Birthday | November 17 (World Peace Day) |
| Nationality | France |
| Languages | French, English, Japanese (to some extent) |
| Fan Name | VezKits |
| Official Color | #C34196 |
On stream, his multilingual style, switching between French, English, and Japanese, is a major characteristic.
As a VTuber from France, he also shows a strong dedication to hyping up the French-speaking VTuber community.
The fact that his birthday is World Peace Day beautifully ties into his lore as a “combat medic who saves people.”
The True Face and Personality of Vezalius Bandage’s IRL Identity
Vezalius Bandage’s real face has not been revealed.
However, the personality of the person behind the avatar clearly shines through his hobbies and preferences.
Vezalius Bandage’s Likes & Dislikes
- Hobbies: Wrapping bandages, singing (especially Japanese songs), playing guitar
- Favorite Food: Creme brulee
- Favorite Anime: Oshi no Ko, Your Name, Kaguya-sama: Love is War, etc.
- Favorite Games: Apex Legends, Counter-Strike, League of Legends, Minecraft, Monster Hunter, Sekiro, etc.
- Dislikes: Horror games, eggplants
By the way, during his past life as Issei Kai, his favorite food was Katsu Curry, and he liked dogs, cats, and shark whales.
The fact that he likes Japanese anime like “Oshi no Ko” and “Your Name” also overlaps with his passion for learning Japanese.
His catchphrases include “Ten ten!” (in a sing-song voice) and “WHAT?! OH MY GOD! GOODNESS!“
It’s also a familiar sight for him to jokingly yell “Disgusting animals!” at misbehaving fans.
Having an Android robot named “Tsuchi” as a personal assistant is another unique part of his lore.
Liking creme brulee and hating eggplants… It’s amusing how his French traits are on full display!
Vezalius Bandage’s Goals Continuing From His Past Life
Vezalius Bandage had his 3D model reveal on August 1, 2025.
His appearance has also significantly evolved from his past life.
While his past life, Issei Kai, had dark blue hair and blue eyes, his current design features black hair, golden eyes, and a scar on his face.
Vezalius Bandage’s Outfit/Model History
- Base 2D Outfit: June 24, 2023 (Debut)
- 2nd Outfit: December 22, 2024
- 3D Model: August 1, 2025
- 3rd 2D Outfit: October 5, 2025
- 4th 2D Outfit: December 31, 2025
And here are the goals that Vezalius Bandage has set:
- Release an original song
- Perform on a real stage in 3D
- Hype up the French VTuber community
The strong desire to “hype up the French VTuber scene” is actually something he has held consistently since his past life as Issei Kai.
Even in his past life, contributing to the French-speaking VTuber community was highly important to him.
Gaining the massive stage of NIJISANJI EN has scaled up his dreams, but you can see that the IRL identity’s core goals haven’t changed.
Continuing to say “I want to hype up the French VTuber scene” since his past life shows he is truly unwavering.
Analyzing the Lore: Past Life vs. Vezalius Bandage!
Finally, let’s compare and analyze the character lore between his past and current life.
His past life, Issei Kai, had the setting of a “Virtual Adventurer who lost his memory and was transported to another world.”
His streaming style was always cheerful, enjoying the adventure.
A lighthearted and positive atmosphere was at the forefront.
On the other hand, Vezalius Bandage’s lore is significantly heavier.
His home village was destroyed by a “crystal curse.”
He is a combat medic who experimented on his own body in order to save his infected younger sister (Lia).
Driven by the anger of failing to save his sister, he threw himself into hunting monsters, which led to him being scouted by the organization A.S.H. and becoming a member of Krisis—an epic backstory.
| Item | Issei Kai (Past Life) | Vezalius Bandage |
| Lore/Setting | Amnesiac Virtual Adventurer | Combat Medic dealing with a crystal curse |
| Atmosphere | Lighthearted and positive | Heavy backstory, but cheerful at heart |
| Theme | Enjoying the adventure | You need to be hurt in order to be healed |
| Core Goal | Want to make people smile | Want to protect people’s smiles |
While the weight of the background stories differs greatly, what we should focus on is the underlying theme.
“You need to be hurt in order to be healed” and “A hero who protects people’s smiles“—both settings share a consistently positive and devoted spirit.
From an adventurer to a combat medic. Even though the stage has changed, the core of “fighting for someone else” remains steadfast.
Isn’t it safe to conclude that the IRL identity’s real personality is firmly reflected in the character lore?
The lore got heavier, but the root desire to “protect people’s smiles” is the same. It really brings out the personality of the person behind the screen.
FAQ (Frequently Asked Questions)
His past life is believed to be the French indie VTuber Issei Kai.
While not officially announced by NIJISANJI, it is widely accepted in the VTuber community due to numerous matching points, such as voice tone, nationality, multilingual style, and activity timelines.
His IRL identity’s nationality is French.
His past life, Issei Kai, was also from France, and their trilingual capabilities in French, English, and Japanese match perfectly.
1) The natural continuity between the graduation and debut timelines (Feb 2023 → June 2023).
2) The matching nationality and language skills (From France, trilingual).
3) The perfect match in voice tone, as well as his French-accented English and Japanese speaking habits. These three are the main pillars of evidence.
He was a French indie VTuber who streamed games, sang covers, and did zatsudan (chatting) on Twitch and YouTube.
He covered many Japanese songs and was temporarily affiliated with Nebula e-Sports.
He graduated on February 4, 2023.
His two genmates are Vantacrow Bringer and Yu Q. Wilson.
The three of them debuted together as NIJISANJI EN’s 8th wave “Krisis” in June 2023.
Conclusion
Thank you for reading to the end!
To summarize the information about Vezalius Bandage’s past life (IRL identity) and nationality…
- Past Life (IRL Identity): French indie VTuber, Issei Kai
- IRL Identity Nationality: France (Matches in both past and current lives)
- Biggest Evidence: The continuity from graduation to debut, perfect match in voice tone and French-accented English, and identical multilingual streaming style
- Shared Beliefs: “Wanting to make people smile” and “Wanting to hype up the French VTuber community”
- Lore Evolution: From an amnesiac adventurer → to a combat medic dealing with a crystal curse. The underlying theme is “You need to be hurt in order to be healed.”
The stage has changed massively from his past life as Issei Kai to Vezalius Bandage—moving from the indie scene to NIJISANJI EN.
However, the essence of the person behind the avatar, his desire to “hype up the French VTuber culture” and “protect people’s smiles,” hasn’t changed one bit.
Having revealed his 3D model, Vezalius Bandage is now aiming to release original songs and perform on real 3D stages.
It’s so exciting to see what he will do next!
Let’s continue to support him together!
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