For anyone curious:




It's from the 14-Hour Live Broadcast with Miss Saki Takayanagi this year.
It's a shame these didn't get translated, but it just states that Sanson is ~about 20 years old, buys his own clothes of adventures, and has an energetic personality.
It'd be nice to get something a little more official or just info, only because I'm kind of curious about why he's... the way he is, haha. (Why he loves song, but has no gift for it.)

The 14 hour broadcast also lists, very briefly, developer notes that aren't really touched upon in the lore book, so I hope in the future we can get some sort of expanded talk.
Also, we noticed the 2nd lore book has npcs that don't even have names to them but still had blurbs attached to them (haha)