[Diamond looks down at their clasped hands, brow furrowed slightly in study as they copy Dazai's movements carefully, then gives a beaming smile when they feel they've mastered the clearly difficult art of The Handshake.

Nailed it!! They're so proud.] Nice to meet you as well! [That comment makes them shake their head, tilting it in mild confusion before a look of understanding blooms on their face]

Oh! That's right... Something like that is usually permanent or even... Ah, what's the word... 'Fatal'? That means they'll 'die' right? [The words are said like using them in general is wholly unfamiliar to them.]