Asriel recognizes that stern expression too. His mom isn't one to easily budge when she wears that expression, and given Rinzler's recent adventures, he doesn't have a lot to use to argue otherwise.

He still has to try.

"But mom, he's - I know he's done a lot of bad things, but I'm not gonna get hurt around him, I promise. He's not like when I've talked to him."