Souichirou Sena

Оригінальне ім’я: 瀬名 颯一郎

Souichirou is one of Unit 8's Willwearer and a lieutenant. Unlike Takeru, he is serious and describe himself as a "person who separates trash" while Takeru is a "person who does not pick up trash." At the time of the series, he considers leaving Unit 8. He wears Oscar I.