Luke mouthing off to Kota and losing would be fun. Payback for the kanji. Khenbish could train Kota (either as a coworker for tending the lounge or out of annoyance at Luke for how he runs things) and it would be cute.
Khenbish and Robert for Robert's sass.
Robert and Themba for Robert's sass.
Luke and Argos because you gotta have a snake and eagle fight.
Storm and Asterion for bonding.
You and Wolf because man's best fren needs his daily exercise or he'll start getting sassy and we already have Robert intentionally using his general quietness as a means of scaring others with what reads to them as indecipherable sarcasm.
In general: Robert.