“I could have beaten a man up at sixteen.” Asuka isn’t about to let that comment slide. Age isn’t an excuse for not being a badass, after all - although Asuka probably is the only person who would think that. Typically, people who are sixteen are not looking to pick fights with adults in the physical sense. “That was like… Two years ago? And I’ve been a badass since forever ago.”
Oh. Eugh. Bodyguarding sounds kind of stressful, but Asuka did offer. Plus, it’s better than owing a favor - even though that mostly wasn’t the point. Really, Asuka had made this all way more complicated than it had to be, unfortunately for Arty. This was as good as it got when Asuka was around which was… Yeah, maybe you should leave if you want your sanity.
“Fine. You should probably learn how to defend yourself though? I mean, what if I decide I actually don’t like you? Then it would suck because I’d just beat you up. If you’re so defenseless it’d be super easy to do, so like… Fix that, I guess? No that you’ll do shit if you’re just hiring somebody.” More unnecessary jabs! She doesn’t even look happy about it - does she think it’s helpful (Spoiler: Yes).
Of course, that gets caught off with a scowl when Arty dares accuse Asuka of not really caring! She cares! She cares so much, how dare Arty assume she doesn’t? Does she think Asuka’s self-centered or something? Just because she’s gorgeous and strong and clearly the smartest person on this train? ….Oh well, if self-reflection were possible then maybe she’d catch onto the joke there.
“I care! Tell me more about the pin your sibling gave to you. It’s literally the only bit of personality for you, so might as well hear about the genius who thought you needed it. They were right - and it was smart you kept it! See? I care!” Overcompensating much? Well, congrats Arty, she’s willing to listen now.
Plus - “You run a business?” There’s a hint of disbelief. “Well, what is it? It’s not fashion or makeup, obviously. Is it boring stuff like taxes? Somebody has to run taxes - you look like you would.” Oh god her business is doomed. She doesn’t understand taxes (not that anybody really does, if you think about it).