Rosaria
One night, a cool breeze blows through the streets of Mondstadt. That breeze seems to feel even colder as an "infamous" nun of the cathedral steps out of Angel's Share, her eyes as icy as her demeanor.

The citysfolk gaze away from her warily, as she steps slowly and silently toward the cathedral, not bothering to look at any passersby.

Rosaria: "Hmph. Nights in this city are always so dull." She sighs. "Then again, I suppose that's not necessarily a bad thing..."

As she reaches the plaza, and the giant statue of the Anemo Archon that hovers overhead, she spots someone kneeling next in front of it.

Rosaria: "Is that... Markus? What is he doing over there?" She raises an eyebrow. "Well, whatever. It's none of my business..."

She attempts to walk past him, however Markus notices her, getting up and greeting her with a smile.

Markus: "Oh, hey, Rosaria! You're out here late."

Rosaria: "Look who's talking." She states dryly. "What are you even doing, Markus?"

Markus: "Heheh... I just got back from a late night patrol, and when I looked up at this statue, I figured... maybe I should offer the Archon some prayers for once..."

Rosaria: "Out here? Why not in the church instead?"

Markus: "And risk Barb catching me? No way. She'd definitely say 'Good, you're finally taking prayers seriously, Bro. You'll join me every time I pray from now on, right?'"

Rosaria: She stifles a small chuckle. "Fair enough. That sounds like a pain."

Markus: "I knew you'd understand, Rosaria. You won't tattle on me, I hope."

Rosaria: "Do I seem like the 'tattling type' to you?"

Markus: "Of course not. Just making sure." He scratches the back of his head, before looking up at the statue again.

Rosaria: "Anyway, I'm heading back to the cathedral. Night, Markus."

Markus: "Wait, I wanted to talk to you about something." He says while glancing back at Rosaria.

Rosaria: "Aren't you supposed to be praying?"

Markus: "Forget about that. Barb was telling me her and the other nuns were going to try to get you to join the choir and sing with them."

Rosaria: "Ugh. Thanks for the warning... because that absolutely isn't happening."

Markus: "Aw, really? I actually kinda wanted to hear you sing, though..." He frowns, looking genuinely disappointed.

Rosaria: "Why? Singing... isn't my thing. At all. You know that."

Markus: "But the other Sisters told me they've heard you sing before... and you sound pretty good, too. I was curious about it myself, and..."

Rosaria: "Where did you hear that from?!" She cuts him off, crossing her arms in a huff. "And wouldn't you rather hear Barbara sing instead? She's much better at it than me."

Markus: "Hmph, I hear her sing all the time!" He pouts. "Her singing isn't interesting to me anymore."

Rosaria: "Jeez... This may sound weird coming from me, but you should really treat your sister better, Markus..."

Markus: "By the way, I'm sure the cathedral is locked by now. Let me tag along, so I can unlock it for you."

Rosaria: "No need, I'll head in through the back, like usual."

Markus: "I gave you a key. Why do you never use it?"

Rosaria: "I don't want them finding out I have it."

Markus: "But that'll defeat the purpose of me even giving it to you!"

Rosaria: "I'm the reason they even lock up the cathedral at night in the first place. To punish me for sneaking out all the time..."

Markus: "And that's why I did what I did to get a key for you! Because locking you out like that is dumb!" He growls. "For crying out loud, you live there!"

Rosaria: "I have to admit, what you did was rather sly. Pretending you lost your key in order for them to give you a new one... Really made good use of your status as the Cardinal's son, huh?" She lets out a deep exhale. "But... I never asked you to do that for me. Don't go around doing unnecessary things, especially on my behalf."

Markus: "You still kept the key I gave you though, right?"

Rosaria: "Yeah. But I'm never using it."

--

One morning, Markus enters the cathedral's kitchen with a yawn. Feeling parched, he pours himself a cup of water.

Markus: "Mornin', Barb..." He utters, taking a sip as he watches his sister prepare some soup.

Barbara: "Greetings, my dear older brother. It's quite the fine morning, isn't it?"

Markus: "U-uh..." He almost drops the cup he's holding in disbelief.

Barbara: "Oh dear! Is everything alright?"

Markus: "Shouldn't that be my line? Why are you talking like that?"

Barbara: "Whatever do you mean?" She asks, fidgeting with her hands.

Markus: "You're acting weird, too. It's... kinda creeping me out..."

Barbara: "C-creeping you..." Her eye twitches a bit, before she shakes her head. "Dear brother, as a Sister of the church, I mustn't speak improperly before the Archon..."

Markus: "It's fine, you're in the kitchen. And you never cared that much about how you spoke before, regardless of where in the cathedral you were. At least in front of me..."

Barbara: "I-I, um... As I said, as a Sister, I am merely... Ow!"

Markus tugs on Barbara's cheeks, causing her to swat his hands away angrily.

Barbara: "T-that hurts, Bro! What's wrong with you?!" She snaps, pouting. "Honestly...!"

Markus: "There we go. You were starting to freak me out for a minute."

Markus chuckles as he watches her concentrate energy from her Vision into her palms, which she places on her cheeks to heal them.

Barbara: "You don't need to be such a brute, jeez!"

Markus: "Sorry, sorry. What were you acting that way for, anyway?"

Barbara: "U-uh, I was... thinking I should change the way I behaved around you..."

Markus: "Why, what do you mean?"

Barbara: "I had a talk with Rosaria, and she told me the two of us quarrel too much. It made me consider just how often others probably see us argue, and I realized how shameful it is..." She blushes in embarrassment. "Not just as a Sister, but as an idol as well... I don't want to be seen as childish, y'know?"

Markus: "I think you're at least a couple years too late to be worrying about that..."

Barbara: "We're not kids anymore, Markus!" She states, placing her hands on her hips. "Rosaria also told me if I don't want anyone to see us quarrel anymore, I should work on myself first. So... I want to act more mature from now on. Especially around you."

Markus: "I don't want you speaking so... stiffly around me. It's weird. Gross, even." He shrugs. "Besides, could you imagine having to act that way all the time? Wouldn't it get exhausting?"

Barbara: "B-but..."

Markus: "Are you really that worried about how everyone sees you?" He sighs. "Fine. Follow me."

They leave the kitchen and enter their room, Markus quickly grabbing something off of Barbara's bedside table.

Barbara: "Hey, that's mine!"

Markus: "Yeah, it's your 'precious journal' you let your fans write in, correct? I'm sure there's a lot of stuff written about you in here, but how often do you actually read it?"

Barbara: "U-um... not very often at all, actually." She admits, her face flushing even more. "I'm too embarrassed to..."

Markus: "Okay, I'll read it for you, then..." He says while casually opening the journal.

Barbara: "W-wait, no!"

Markus: "'Sister Barbara has such a lovely voice. I look forward to prayers just to hear her sing.'"

Barbara: "Stop!"

Markus: "'If out of ten a glass of Sweet Flower milk ranks ten, then Barbara is as sweet as ten glasses.'"

Barbara: "Q-quit reading it!"

Markus: "'I catch Barbara arguing with her brother a lot. She acts so differently around him, but it's just another side of her that makes her even more charming.'"

Barbara: "... Huh?"

Markus: "See, you're an idiot, Barb. You were worrying over nothing."

He smirks, as he continues reading.

Markus: "'Barbara's so sweet, it'd be nice if her grump of a brother were more like h-...' Hey!"

Barbara laughs, while Markus slams the journal shut in annoyance.

Barbara: "Hey, keep going! I want to hear what even more of them have to say!"

Markus: "Oh, so now you want me to keep reading it?!"