I've been working on two, mainly out of boredom.
Aria pretty much takes the place of Avatar, whose slightly scatterbrained when not on the battlefield or working on new strategies, she is the most likely to lose track of time in the army. She can S support with Henry, Lon'qu or Inigo. The only support I've gotten done is Aria x Chrom
[spoiler=Chrom x Aria C]
Aira: Hiyah! Yah!
Chrom: Still training, Aria?
Aira: Hah? Ah, Chrom, yes I am, after all I need wit as well as training on the battle field.
Chrom: I see... Mind a partner then?
Aria: Not particularly... I was planning to go eat lunch actually.
Chrom: What? Aria, you do realize it's PAST dinner right?
Aria: What? Oh no... Please excuse me!
Chrom: Ah, wait!
...
Chrom: She's gone, she'd headed the wrong way.
[spoiler=Chrom x Aria B]
Chrom: Hm... Aria.
Aria: Hah! O- oh hello Chrom.
Chrom: What are you doing?
Aria: I'm planning new strategies, the battles have just been becoming more difficult as time passes, I need to keep us ready for anything.
Chrom: That's good... When did you start?
Aria: Huh? What do you mean? I started with the rising su- Oh! When did it become so dark?
Chrom: It's good that you such things for us, but if your forgetting your needs to balance thi-
Aria: Yes, understood sir, now excuse me!
Chrom: Aria!... Sheesh, shes gone again... She's going to get in trouble one day because of this...
[spoiler=Chrom x Aria A]
Aria:... Ah... I feel faint and odd...
Chrom: Aria?!
...
Aria: Nngh...
Chrom: Good, your awake... That was close...
Aria: Eh? Where am I?
Chrom: In your tent, Lissa just left, she was quite angry you know. I can't believe you could forgot about such a large gash on yourself!
Aria: Really? I apologize for causing so much trouble... I hadn't realized...
Chrom: If you really want to apologize then take better care of yourself, I don't know what we'd do without you.
Aria:... I'm really sorry... I'm really troublesome aren't I?
Chrom:... I'm sorry if I'm being harsh, I really was worried. How about we watching each others backs then? After all I slip up sometimes too
Aria:... Alright, promise, though I don't believe you'd slip up that easily.
Chrom: Haha!
I guess it's okay for something I came up randomly in class.