Extra NP levels:
Siegfried - He’s NP2, grailed to 90 and one of my favorite servants, lorewise. I’ve been waiting a long time for that NP3 to get him to 100, but I’m not sure spending the ticket on him is the best idea.
Tristan - I picked him with the last ticket. Now he’d be NP2. He’s my favorite out of the Rounds, great at CQs and fun to play overall. He’d also get a couple grails if I do pick him again.
Circe - I like her a lot more than Sheba even if she’s much weaker as an actual ST caster. Nice utility and her NP can crush some quests.
Caster Gil - I like my arts comps as much as anyone else, but I’m lacking in proper supporting options. CasGil is incredibly good at the job.
Wu - One of the stronger assassins, a nice support/DPS hydrid. I quite value quick supports not called Skadi, because I simply dislike using the brokeback casters. Big drawback is her material requirements. She’s one of those “bronze hell” servants.
Chiyome - Incredibly fun to play, personally. As simple as that.
Penth - I like the character a lot and she hits like a truck. I do have NP3 Herc, NP2 Beo and NP2 Banana, so she’s lower on the list.
Out of all these characters, only Tristan is actually story-locked. So in that regard, he has an edge over the rest. That said, it’d be nice to have someone new, especially if I QP cap myself again with Da Vinci lotto.
EDIT: Just noticed most of these characters are lolis… What are you trying to tell me, game?