Kotarou's nickname is "Kotarou the Runner".  He's a master of defensive battles, and minimizing losses when things turn bad.  His quiet, unassuming nature and the way he fights make him less likely to stand out than his other friends.  However, if he was put up against a real foe, someone who he couldn't beat unless he gave up on running, you might just learn his true name...
Well, you wouldn't know unless you 
stripped the coward's skin off him.
حسنًا، ما كنتم لتعرفوا إلى 
.أن تجرّدوه من جلد الجبان
No lo sé. Pero creo que esta vez
tendrá que deshacerse de su cobardía.
Bem, você não vai saber até conseguir
 tirar aquela máscara de covardice.