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...
What are you talking about?
You can barely move your limbs.
.عمّاذا تتحدّث؟ بالكاد يمكنك تحريك أطرافك
Diz isso, mas mal consegue
 mover seus membros.