Alas, he always introduces himself by his dad's last name. Maybe he should let it go after a year of half the ship using his first name regardless, but he's stubborn.

"I couldn't care less about what happens to his earthly remains, and anyone who might've cared isn't around anymore."

Mizuki would've known. Natsuno still misses him - the sea jelly was a good friend, despite his atrocious taste in romantic partners.