Hi this is a bit old but i MISS SEPHINE SOOO MUCH I'm answering it now.
Favorite people is a little difficult. I think she's generally pretty lax about her company-- that said, I think people she can joke with (who understand that she's joking) she likes the most. In the scions, that'd be a lot of them-- Thancred, Estinien, Alisaie... She does love to poke fun at Alphinaud and Urianger... She gossips with Krile and Tataru-- basically, I'd say she's pretty comfortable with her coworkers, lol...

As for outside the scions... She and Aymeric act like very old friends. She goes to see Carv often, too. I'm sure she has more but those are the only two I can immediately think of. lol

People she dislikes. Erik (monk quests) & people like him. She does not care if hes a tsundere or secretly deep down thoughtful towards individuals. She hates people who talk down on others based on their education, or those who are just obnoxious. Unfortunately for her, academia has plenty of people like that.
She will relentlessly talk down to them, in return, and it is scathing. Anyone who has ever seen it happen thinks it's frightening. Scary lady.

Tldr: She likes sarcastic people with subtle attitudes. Hates know-it-alls and will do everything in her power to take them down a few notches.

I think in my heart her magic is a mix of all magics.. she can summon far more than just what's limited in the game... she still has cross-class skills... lol
She excels in magics, but I think she might?? MIGHT do ok as a Sage. I think it suits her & makes sense lore wise. She CAN do astrologian readings but I don't see her ever using astro skills as its presented in the quests. She and Janne go way back. I also think it makes sense she'd know it because... Sharlayan & Ishgard :)
Her carbuncles name is Lemon.

Ruzha too, is a summoner! I think his fighting style is far more aggressive in general. He also is very good wish magic... I can see him as a reaper and as a dark knight pretty easily. But I think he is strictly magic unless he's backed into a corner. Ruzha has a hard time getting physically close to people (doesn't like being touched, needs physical distance from others) So I think he'd stick to mostly casters. He absolutely can fire a firearm though. Both bows and guns... He's got great aim!
His carbuncle doesn't have a name, it's just "Carbuncle", but he does love him. his little friend. his trusted creature. It's one of the only things Ruzha lets hang around closely to him at almost all times... probably because it's made of his own aether...?

Neither Sephine nor Ruzha actually need the summoners book at this point to channel magic. It's just a bit easier with a focus, and they're both strong, so holding a book to make things marginally easier is worth it. If the book is lost during combat though, it's no issue... Ruzha has 100% used the book to smash someone in the face when they got too close. I've talked about this before, I think, but I associate them both with fire in different forms... but either way, you see them with ifrit and phoenix pretty often. The bahamuts of course are also very common. Though usually in combat it's ifrit who comes out to play, unless it's serious...! Imagine if you will, someone who calls their summon out, and it STAYS out to fight, as it's own entity with the ability to communicate... Like that. Phoenix is more of a concept creation, and Bahamut doesn't speak. But the other primals they can call sure do chitchat. yappers.

I'd like to answer this again someday in the future-- but she understands and can see how they got from point A to point B, and can admit that she might've made similar choices in their shoes... But in the end, the choice is to fight them. Their ideals can not coexist.

I'd like to talk more about her Azem someday-- I believe they do meet briefly at some point.... But her Azem has no name and barely any design. All I know is that they are free from Gender and are closer to Ruzha in aggression and distrust... I think I'd like to further flesh them out sometime and return to this question!!!! I want to talk more about Azem but it's hard when they don't even have a name... for the record, but ruzha and sephine would share the same azem, simply because I think that's fun (and way less work)

She loves to travel! She's a nerd, so I'm sure she enjoys places like Radz at Han & her alma mater (Sharlayan), but I also think she just enjoys being around different places and people.

For places she hates... Her parents home in Ishgard, and anywhere where it's too hot! Though I think she can handle casting a little cooling magic for places that are unbearable. She doesn't like Labyrinthos (from a technical standpoint and whats done there she thinks it's extremely cool but I also think she'd find a completely artificial zone deeply unsettling. She feels the same towards the Bestways Burrows, but they get a pass because they are both cute, and didn't know any better)

She likes birds and the ocean, so I think she enjoys Thavnair and Limsa...

For Sephine, who is a scholar first in her heart... I think she finds being a walking, talking political bargaining chip & her own one-man army very off putting. She's used to the scrutiny of Ishgardian society, always deciding the value of others... But I think the weight of being the warrior of light is very taxing on her. If she could choose, having the strength to defend those she loves, while also being an observer, would be ideal. Of course, that kind of thing is completely impossible, and it'd be naïve to dream of it.
The responsibility of being WOL itself is not the issue. I think she's just inherently bothered at being the piece of history, and not the observer.

For Ruzha... It's similar, but I think there's also a weight of having to trust others, and saving people who may not deserve to be saved in his eyes. As a WOL, you cannot choose who does and doesn't deserve to live... Everyone deserves that opportunity until they've proven there's no other option but death. Ruzha himself is paranoid and anxious, his life has taught him about all kinds of cruelty in the world... But he still chooses to forgo his (trauma?) beliefs in favor of doing what he believes the people he cares about would believe is correct & just.

TLDR: Ruzha has a harder time with it than Sephine, but both deeply acknowledge the weight of being the WOL

I assume you mean wol w/another wol... Sephine is usually married to an au ra named Tomo (@/tasobi's alt, lol!). She jokingly calls him "mr. praetorium" because thats when she saw him and almost killed him. They actually went to school together in sharlayan and he's had a crush on her the entire time, but she never even gave him a glance. It wasn't until after the praetorium (he snuck in to look at some machinery) that she notices him & meets him occasionally throughout her adventures.

He fumbles every time he sees her because he's a nervous little baby man, but she thinks it's cute, so it's ok. When she sees him again for the first time since the praetorium, he introduces himself and says they've met before (meaning they went to school together) but her response is "oh yes. You are Mr. Praetorium." It's ok Tomo. You win eventually.

I said "usually" because I dont consider her partner 100% canon... Sometimes I like her single or with npcs, basically.

Also, yes. I do see her as the WoL, i think it'd be far too much trouble for me to change the story around that much... When it's Ruzha, he is the wol, and Sephine doesn't exist.

I hope all this makes sense, it's a long one... I also hope you meant wol/wol and not wol/npc... send me another if you want npc i'd be happy to talk about that too 😭😭

I tried and I can't think of a guilty pleasure!!! For guilty pleasures... it's difficult because she's broken free from her shackles of being ishgardian (debuff). I'm not sure there's anything she's guilty about enjoying.

So, I'll do a secret-- some of the scions know, and she definitely doesn't bring it up casually, before she ran away from home she was pretty promiscuous, mostly to use it against people. She does NOT feel bad about this (mostly...) No one who sees her (and manages to recognize her) in HW would dare say a word, because it implicates them, too, lol. Plus, she's completely mellowed out in her mid 20s-30s.
She does keep a lot to herself in general, but I don't think they're secrets. She's just private in general.

I hope these kinds of things were what you were looking for ;w;;

I've never gotten this question..! I started playing xiv in late shb, and at the time I wasn't particularly enamored with that many NPCs... It wasn't until later when I started to level other classes, read the short stories, & care more about the little details of plot that I came to learn about the ward and all the members we don't get to see. I kinda took a nosedive in like 2021 w/ ward & elezen content, lol. Just dug around, found whatever I could, learned what they did, said... Found myself going back thru pixiv and twitter to find old fanart-- i'm sure it makes sense, lol. Just took a dive and then haven't recovered... DSR made it way, way worse. lol