Manabu means "learn," which I found out from another fan, and yes, it seems like the character was named after that Yukawa. I can't imagine what his parents were thinking.

Your husband sounds like he's well-read and enjoys your company. And your boys sound duly appreciative of the universal appeal of things that go boom. I did read your blurb in your bio, and I'm impressed that you home-school with six children. I've only got the two and home-schooling the one that is school-aged is a challenge.

There's a number of nuances in Yukawa's speech like that. He's very formal and very polite (almost to ridiculous levels, but not very unusual even so). I've heard that dialogue in Japanese television isn't an exact match to real-life dialogue, so frequently I'm listening with a grain of salt.