Alloy would go comically wide-eyed, consider that this has never happened before, and grab. Smooch. Let go. Consider. "Sorry, I'm not really that into you!"

Ginger would eye them and probably go for a fling if she thought that they were hot. Or drag them cross-continuum bar crawling despite being too young to drink. And probably end up getting into serious trouble.

Marvin would be flustered. He would probably try to back out of the situation, as he would not quite know how to handle it. Then again, if the lover was persistent, he would eventually cave and try to treat her as best as he can.

For Printworthy, it would depend on if she was an equine or not. If she was a pony, he would return the compliment, and offer her a nice night out, to try and know her better. If she was not, however, he would be courteous and thankful for their admiration, but respectfully deny any shared feelings towards them. He is a pony, see, and just does not think of other creatures in that way. Non-pony equines would be on a case-by-case basis.

Jumper would just laugh, perhaps flirt a little, then offer to take them on an adventure. Likely while singing "A Whole New World." What happens next... Well, we shall see.

Doc pretty much wouldn't notice for a long time. Once he did, he wouldn't really know what to do about it for a while, until eventually, awkwardly, explaining he's aromantic and asexual.

Séverine would assume they were teasing her, and march off, insulted. Even though Yoof is man-size, I'm treating him as a puppyish-age mawg, so he wouldn't notice/know what was happening, and Séverine would keep people like that away from him.

Vania. Urm. I still don't have a very clear idea of her sexuality or romantic nature. I think it's because I lack those things, that I'm having difficulty picking up on hers. Nothing feels right so far, so I don't really have an answer for her. Maybe I'll figure it out as I write her more.

Carline's thing is that she lusts after obscure characters. Not totally sure how that would apply to PPC characters. She either would have no interest for anyone from HQ, or she would only be interested in folks from the less common divisions and departments, like the DOOCH or Finance. Being a Sue at heart, her lust is reserved fro canon characters.

Gaspard: Take a good look at this guy. Crooked nose, cystic acne and scars all over his face and shoulders, mixed-race, long history of being kicked/punched/robbed/swirlied at school, and hates himself with the intensity of a billion exploding O-class stars. He's decided that he's better off not bothering anybody-- and besides, if someone was into him by now she'd have shown interest or something. Don't expect him to complain about it: after all, big boys don't cry.

Harris: You're not going to get much out of him: he's about as dense as your average neutron star. Couldn't understand if a woman was flirting with him, no matter how hard she'd try. Did she compliment his looks? Why yes, he is having a pretty good hair day today. Did she just give him a box of chocolates and her RC number? Oh, that's nice: she just wants a chat. Did she grab him by the collar and yell out a confession of love to him? She must be tired and stressed out: take a nap, he says. You'll feel better. Repeat ad nauseam.

Penny: She'd be extremely flattered but would have to turn her would-be suitor down because she's already in a stable long-term relationship with...

Nasir: ...who would very bluntly say no to anybody who'd approach him because he's with Penny.

Yakov: He'd jump right into romance-mode. Hopefully he won't come off as "too desperate" this time. Or "too creepy". Or "too weird".

Luisa: Not interested right now. There are Sues all over her fandom and she's not having any of it.

Well, Cali is in a long term relationship with Cadmar (written by Caddy-shack), and Cali was the one who first had the interest. If it was anyone else, he would blush and stammer and not know what to do. He still does a lot of that with Cadmar (at least as of the last time they appeared in 2012). They are totally still dating in 2015, though.

Agent Miah...I really don't know. She's not particularly interested in sex or relationships, so it would maybe depend on the person.

Kelok is asexual and still deals with trauma from his fic of origin, so he would be immensely uncomfortable and try to escape as soon as possible, and then probably avoid the person and any place he expected them to be.

Unger is kind of a kid, and an immature one at that, so he generally comes across as more mascot material or cute (with a side of arson) than as seriously a potential mate.

Carry on the other hand, is 100% comfortable with sex as a biological imperative and is pretty likely to take them up on the offer, if he thought the other agent was serious with it and that they are also looking at it as a biological imperative. He's not particularly interested in romance and long-term emotional relationships.

ELEPHANTS!

In all seriousness:

Randa would probably get a kick out of it, while Rina would think they were just messing with her. She had... bullying issues for most of her life.

Ari would be confused and flustered. A lot.
Theia was romantically involved with Anebrin, at least briefly.
Tera would be probably be interested, though I'm not sure how her species parses romance.

Lana and Riaa'lzhor are in a committed relationship and have been for several years, so they'd likely just let a new person down gently.
Narav is aromantic, I think, and so would probably decline any kind of romantic relationship offers.

Cepha and Amara are going to end up as an item. Amara is one who would probably be quite confused at a stranger being in love with her, and (like Kala, I imagine) would probably react badly to being suddenly touched.
Fiorano would react like Ari, I think.

Agent!Des would probably blush and stammer, then continue as normal.
Anebrin was romantically involved with another agent.
The Librarian would probably be rather annoyed and would try to avoid that person.
Amris is a drone. A machine. It'll probably be very amused.
Navare, I've no idea.