Birthday

January 28

Horoscope

Aquarius

Blood Type

O

Height

142 cm (approx. 4'8")

Weight

39 kg

Hair

Blonde

Eyes

Blue

Affiliations

Vulcan's Workshop
Special Fire Force Company 8 (Associate)

Occupation

Apprentice Engineer
Mechanic

Family

Vulcan Joseph (Guardian/Mentor)
Lisa Isaribi (Guardian)

Likes

Vulcan Joseph
Lisa Isaribi
Machines

Manga Appearances

Fire Force Chapter 46

Anime Appearances

Fire Force Episode 16

Yū is a small, quiet child affiliated with the White-Clad faction. Despite his young age and frail appearance, he carries himself with an unsettling calm that contrasts sharply with the chaos surrounding him. He wears simple, loose-fitting clothing that emphasizes how out of place he seems in the violent world he inhabits, reinforcing the eerie impression that he is not meant to be a frontline combatant, yet is present all the same.

Little is known about Yū’s life before joining the White-Clad, but his behavior suggests a childhood stripped of normal emotional development. He speaks softly, often in a detached or blunt manner, and shows little outward reaction to danger or death. Rather than fear, his actions are guided by obedience and a distorted sense of purpose, shaped by the ideology of those who raised and directed him.

Yū tends to follow orders without hesitation or moral reflection, treating missions as simple tasks rather than ethical choices. This makes him both effective and tragic, as he lacks the emotional framework to question the violence he is involved in. His interactions with others are minimal, and he rarely expresses personal desires, giving the impression that his identity has been almost entirely consumed by his role.

Despite this, there are moments where Yū’s childlike nature subtly surfaces—brief pauses, simple questions, or moments of confusion that hint at the life he never had the chance to live. These glimpses make him less of a conventional antagonist and more a representation of the damage caused by indoctrination and exploitation.

All members of the White-Clad are driven by fanaticism or ambition. Some, like him, are merely products of a broken system, carrying out roles forced upon them long before they were old enough to understand what those roles truly meant.