"Are you the favorite now?"

Kai x Tigress

Obviously he calls her "Kitten".

Kai will act more laid back and less stringent about missions just so Tigress will be annoyed with him. She'll get onto him about not taking things seriously, all while he just smirks down at her.

He loves to tease her; she makes it easy for him.

He will not hesitate to mock Oogway in front of her, just to make her angry- he's a jerk, and besides, who better to mock him than his own brother?

Fun fact! Tigers don't purr- but bovines do, in a way. Tigers do chuff, though.

One thing Tigress can respect about him: he was a great general and warrior. There are things Kai doesn't mind teaching her, and she's willing to learn from him.

No one at first knew they had something going on- both of them are very subtle about it, not the types for being "mushy".

I don't know what the context would be, but I can see Kai talking to her, his face just blank and serious, Tigress glaring up at him as he flicks her ear, just playing with it. Just...he's so horrible.

I don't think Spirit Warriors sleep. I can see Tigress sleeping while Kai watches her- not in a creepy way, but a sweet way, a way he never looks at anyone else, or even her, when she's awake. His expression softens somewhat, almost into one of longing; just seeing her so relaxed, breathing softly, makes him feel a sense of contentment he hasn't known in a long time; but he's always gone by morning. No one has to know.

But one thing they have in common: both are surprisingly good with kids! It shocks everyone even more to see Kai with a lot of kids crawling all over him, and that he's actually nice to them. There may have been a joke or two directed at him and Tigress, asking when they're going to adopt.

Kai x Veruca

He calls her "Little Weasel".

She calls him "Bully-Wully" or "Beastie".

He doesn't pretend to understand most of her British lingo and doesn't hesitate to make fun of it- he's a jerk, of course he would.

Veruca would flail all dramatically in his arms like in those old romance novellas just to annoy him.

She's really interested in his "magic"- she constantly asks him how he collects chi the way he does, praising him for the technique and stroking his ego- but Kai knows better than to tell her anything besides surface-level basics, no matter how she might press; she's a big enough threat already, no need to give her the method of acquiring her own jombie army.

If particularly miffed with him she will not hesitate to grab one of his ears and pull him down to her level. Very painful for Kai, very satisfying for her.

Kai on his end can easily just...pick her up by her scruff and hold her at arm's length, chuckling to himself as she tries to kick or scratch him. (He does it to Klaus alot too).

Veruca will sometimes drape herself over Kai's boulder shoulders like a stole.

Also climbs his horns like a jungle gym (or a ladder to get things).

Helps her bully her brother. Kai, being Kai, his teasing is much more darker and mean-spirited; when he goes too far, that's usually when Veruca grabs his ear and starts shrieking at him. Only she is allowed to be mean to her baby brother!

Honestly it's an extremely toxic relationship, because neither of them really trust each other (and they shouldn't).