Tatsuya nods at the boy with a smirk on his face, small spear eh? There's something he can work with.
"Got it, I should have that done in... Hmm, a week. It'd normally take longer but after all that stuff with Ai's sword? I've gotten a pretty good idea of making stuff conduct magic. So yeah, gimme a week. And as for size, I'm thinking two and a half feet or so?"
Tatsuya then looks back to Haruko... Swords? She doesn't seem the type, looks can be off but...
Chakrams huh? Needs magic, lots of it to keep em coming back after use. Something with magnets? Or maybe just a summoning type, wait, what about a device that just makes more on the spot? Might be... He'd shake his head, no need to get lost in thought.
"Chakrams might work, most wouldn't suggest using them as your only weapon but uh I could cook up something to make the things come back after you toss. That's custom work though, and mystical too, I'd need time to figure it out. For now, I can just you some... And uh, how well do you heal anyway? Might want some blunt ones at first to ya know, not die by cutting yourself."
He'd then look over to Ai and sigh... So, someone finally asked him that question huh? Well now there's a hell of a thing.
"Why? Lots of reasons honestly, I want to help people sure. Part of it with me? Just a simple love for this crap frankly, I like staying up till 8 in the damn morning building weapons most people don't think exist, I like getting into fights with demons an gods, even if the almost dying part bugs me."
He'd then pause for a moment, rubbing the back of his head before looking down.
"But the biggest part of all? For the longest time, I didn't have anything better to do, and well I wasn't willing to end myself or anything. I've lost plenty of people, but in the end I just keep on going because it's all I can think to do. Can't talk about you, but I ain't giving up on trying to do some good yet, even if it's just one person, that's worth something."
Tatsuya puts his hands in his pockets, pulling his lighter out and absently looking into the flames as he flicks it on... Geez, didn't expect this to turn serious, but if nothing else. It is at least interesting trying to put this in words.