*

Ribs isn't a character, just ribs. XD The game said that Ike loved to eat meat and ate a lot, and mentioned that Soren didn't like eating so much. Somewhere along the line it turned into a joke that Soren was jealous of Ike's love for food. Ribs were just how the joke took form, until it became Ike having an almost Ilyana obsession with food (especially ribs, as that's such a manly food) while Soren looks on in jealousy and wished that Ike showed such enthusiasm for him.

In Japan it's usually a porkchop shown.

Soren tolerates Aimee when she's useful XD He might be a little more tolerant of her because he knows Ike can't stand her advances and thinks she's crazy, but that doesn't mean he doesn't keep an eye on her.