Bushido

Bushido is a skill introduced in Fire Emblem Fates. It is the personal skill of Ryoma.

Fire Emblem Fates
If Ryoma is the lead character in a battle and his support unit's level is the same or lower than his (Level -20 if they are in a first tier class), he will deal +2 damage and receive -2 damage during battles and his critical rate increases by 10.

Trivia
Bushido is the inverse of Competitive, Takumi's personal skill, as Bushido receives its boost when Ryoma has a higher level, while Competitive does if Takumi's level is lower.