Isagi's team cinched a win due to the awakening of Barou as a villain on the field. To cause more chemical reactions in the fourth stage, they picked one player from the other team, who demonstrated ego to devour them during the game. In the meantime, Bachira and the Top 3 are looking for the next opponent. Rin sees through Bachira's "monster" during their training, which forces Bachira to face his own ego.
Maybe he's another monster 
I don't fully understand yet.
لعلّه وحش آخر لا أفهمه تماماً بعد
Vielleicht ist er ein weiteres Monster,
das ich noch nicht ganz verstehe.
Puede que él sea otro monstruo
al que no termino de entender.
Puede que él sea otro monstruo
al que no termino de entender.
Si ça se trouve,
Forse in lui
Talvez ele seja outro monstro 
que não entendo ainda.
Может, и он чудовище…
просто я пока что не могу его понять?