[MrTerrorist]

Spoiler for c106:

So we find out why Yarai is rather nice to Motoko-sensei. It turn's out when he was a kid, kids try to fight him due to height and many thought he was a punk due to his looks but the one person who believe in him and never judged his looks was his late mother. Yarai is protective of Motoko because she reminds him of his late mother cause she too also never judge Yarai by his looks. Of course, this explanation calms Saki who's in love with Yarai and thought he likes Motoko. Next stop for Yarai group? The tower where Akira's group is currently camping.

PS: Eat your fish kids, even if it looks scary!