Kahl's Azem adored (in a manipulative sense) Themis and Erich, which was a big factor in his relationship with Athena. He doesn't get along great with Hyth or Emet(Hades? Idk), but he does like Hermes. He often acts as a confidant for him and has more than once given him questionable advice

Kahl would go back to when he was younger and either try to stop his sister from running away from the steppe, or leave with her. Neither of which would be something she wanted, so it would ultimately be futile for him to even try. (Not that he WOULDN'T try, but it's better for him if he doesn't. It'll only break his heart more.)

Not great! Kahl resents the power he has from Azem, and Azem hates people like Kahl. Dumb, no desire to learn magic or pursue research, always wanting to help people, can't control himself (much akin to a wild animal), no ambitions, ect. Everything that Kahl is, is a direct opposite to Azem, and they would not get along.

Kahl has Azem's eyes! Kind of literally. Azem's spying magic was set up for his descendants to inherit it, (even against their will) so Kahl's eyes hold his ability to see through objects and spy on others when they're not around. He also has the same glowing gold eyes Azem had, which gets more intense if he uses the powers on purpose.

Kahl's canon class is a DRK/GNB combo, but he started as warrior. After shb he also picked up conjury, but not enough to get it to whm, cause he only picked it up as a tribute to Fray.

He's also proficient in culinarian, goldsmithing, and armorer/blacksmith! He made his living in limsa off those before he started adventuring.

Black mage ✌️

He gets along fine with their mom, if not a little awkward. She's like a high class lady and he doesn't know what to do with that. He despised their dad the second he publicly disowned them and he makes no effort to hold back his disdain towards him.

The way I was trying to think of "oh what would make kahl not have sex with someone" and i literally couldn't think of anything

Yes! Kahl and Lyna get along very well, he helps her out with getting supplies for the soldiers and trains with them from time to time, and they'll go on little lunch dates to swap stories about g'raha

His emptions of sympathy are only tied to people he cares about, yeah. When something sad happens to someone he doesn't like (or just doesn't care about) he just acknowledges it and not much else. He feels for kids or victims or circumstance, but unless it's someone he either cares about or fell blindly in love with, he doesn't really care. High levels of apathy.

This is kind of hard because i've barely played any of the caster classes, but maybe blue mage? does that count

It's really easy to get a bad end for Kahl, but his character specific bad end is the protag isolating yall somewhere and kahl obsessively devoting his heart, soul, and body to them (with no interest of leaving). You can also get a blanket bad end where the protag says too many things wrong and Kahl won't speak to you ever again. It's kind of hard to get a good end for Kahl, because it requires you to not give him what he asks for, and instead what he needs. Which means sometimes the right answer is to tell him no.

Kahl's eating the meat that's slathered in sweet sauce! He's not picky, but he loves to add sweet sauce. He'll also take the little sausages and cut them into an octopus shape for funsies. He always eats a ton though, like he shouldn't be able to fit that much food in his body but he'll eat the yakiniku place out of house and home if they let him. (He also likes his meat crispy but not charcoal-burnt)

Asha is my cousin's wol! She's a small feral lizard that grew up in the unpopulated part of the desert in Thanalan, and is super in love with Haurchefant. They became fishing buddies when Kahl offered her some bait she was out of (because she had been eating it like an animal) and they got closer after that. They're as close as siblings, practically adopted each other.