Blank Sword:: Sword changes based on 相手 interactions
Hero?: Hmm... what type of hero would 自分 be?
Constant Growth:: 自分 Grows to Transcend 相手's Level
Ultimate Skill:: Refers to a skill that ends the battle
[Blank Slate]: 自分 has no memory, personality, or anything—he was just born (Albeit supernaturally). Thus, as the battle develops, write his growth in this format:
[New Trait]:
[New Skill]:
"[Blank] Will Remember This"
[New Character]: At the end, 自分 has finally developed, becoming a person. Thus, name his new name & Ultimate Skill:
[Name]:
[Ultimate Skill]: (Skill Based on His New Identity)