i may be slightly biased here but either cain or bradley. not much explanation needed for cain's, not being able to see people sucks very much. as for brad the thing about it, it's made to kind of counter himself. the spontaneity of it is really troubling. i've seen people say 2 things about it: that it's a cry for freedom while being under the twins imprisoned and that it's a symbol to show just how unpredictable he can be in the eyes of others and i really agree with both of those interpretations. but also at it's core teleporting after a really normal thing your body just does sometimes is fucked up and inconvenient. mithra would also have it bad but it looks like the story is omitting the consequences of not sleeping like your brain literally shutting down but if it didn't mithra would have it the worst.

i usually listen to vocaloid music. recently i've been listening to den kujira and sasakure uk and recently i took a liking to nevermore (not vocaloid but good) fantazm (REALLY REALLY GOOD. I DON'T GET IT WHY IT'S SO UNPOPULAR. PLEASE LISTEN TO IT) and also xeno and amara. obviously also other vocaP like teniwoha and mochiutsune etc. i can tell more but it's gonna be complicated i think. from western artist i really really like the scary jokes, obviously cosmo sheldrake and recently took a liking to tv girl. and as a genre i like breakcore but it's so hard to find good playlists or mixes, i don't really know any breakcore artists yet.

I really like this question actually!!!!

okay so i think the best ones are (in no particular order):

1. stamina recovery by turn and participation
   very few cards have these ones but in 4th anni set like 5 of them have by participation. and also 2024 bday bradley has this skill so i kinds regret not having this card
   by turn only 2 ssr cards have it but at least they're in the normal gacha pool so you might get them someday.

2. chance to increse ALL parameters
   not much to explain here, pretty self explainatory. very useful. singular parameter increases are okay but all parameters is the best obviously

3. training great sucess chance
   also pretty easy to understand and pretty common

4. chance to add parameters at the beginning of the turn.
   this one is really useful when trying to get a max chibi but then every wizard should have this skill with all 5 parameters.

if you mean like scenes from events then i would have to dig a little because i don't remember small stuff from them. but overall i really deeply love how shylock comforts chloe. really probably my favorite non fated pair friendship. for example there is this scene in ms2 where shylock hugs crying chloe and that reminded me so much why i love them so so much. chloe and bradley is also really cool, i love how chloe fangirls about him (why they didn't get an event set together yet i'm looking and you c0ly) and the last one with chloe and the most obvious one is with owen, what's better than a bitter and cruel northern wizard recognizing a kindered soul in a wizard that not only is very young but also a western wizard that northies are bad against. rn i can remember the scene from the beginning of 4th anni where owen just comes into chloes room through a window. their conversation there is very good. riquet and shylock are also an incredibly good duo, i really need to read alterego for them. and another one i recently took a liking to is oz and figaro, everything about them is so incredibly messed up and i'm ready to have numerous headaches because of them. just realizing rn that i can't think of many more, i should read more events because i know many of them have great potential for example shino and cain and lennox. the retainer trio who could make eachother worse very easily. or shino with arthur. or even shylock and nero. they could be also made unwell with right switches flipped.