Briefly: Road's views on people may or may not be what you expect from how she interacts with them. Obviously some people fit into more than one category, but they've been slotted in the most suitable one.
Family - Family is family. To be protected at all costs, and the only people she truly both trusts and relies on. Touch her family and if she does not seriously like you, you're probably dead. Even if she likes you she can't easily forgive messing with these people.
- Tyki Mikk - Her dear family from back home. She trusts him completely, and cares for him utterly. Not particularly protective of him unless he needs it, if he's hurt she will flip out. She enjoys harassing him, tormenting him, making his life a misery, and demanding he sing to her pet venus flytrap named "Allen".
Friends - True friends? Kinda rare. More likely someone she likes is a plaything, but there is, now and then, someone she is genuinely fond of. They don't get the same trust as family, but they're above everyone else.
None yet. A few candidates.
Interesting - Not quite friends, maybe something else entirely, they aren't playthings, but they aren't trusted yet.
- Edward Elric - Can we say substitute Allen Walker? She doesn't have any kind of crush on Edward like she does Allen, but she is incredibly fond of him already. He reminds her so much of Allen in his stubborn, single-minded determination to save his friends and his good heart. She sort of wants to genuinely be his friend, but her nature and his are such that she knows it's not a long term possibility; she hates people, she wants to destroy them, he wants to save people. That they'll eventually be at odds is inevitable. Still, she'd like to hold off the time when he figures her out for as long as possible.
- Hunter - He's not human, exactly, which makes him interesting. He has a delight in killing people horribly, which she can totally relate to. He brings her candy and treats her like a friend, in turn she hasn't quite opened up to him, but it's possible she might. He's not quite a true friend yet, but he's above a plaything.
- Soi Fon - Not human. A death god that intrigues Road and reminds her simultaneously of Lulu Bell and Allen Walker. This combination inclines her to liking Soi Fon, but makes her wary of revealing what her true nature is like to the woman. Because she thinks Soi Fon is at heart a good person, and isn't a human, she's inclined to somewhat trust her in some matters, but the good person part makes her also wary.
- RED Spy - Utterly likable. She finds him intriguing and intelligent and would love to watch him work some time. His open disregard for her potential sadism puts her at ease, and his gentlemanly ways charm her. She kind of wants to adopt him as an adorable brother, if only he didn't have that horrible flaw of being human. She's willing to overlook that though.
- Minatsuki - A girl after her own heart. Not particularly one to be as crude as Mina, she certainly doesn't mind Minatsuki's vulgarity. She'd love to have fun with Minatsuki and just have girly time painting the town red. Someone who views human trash like she does. Also Minatsuki gave her the Venus Flytrap she's very fond of.
Playthings - She likes them. They're fun to dick around with.
- Akihiko - He was such a nice guy, the one time she interacted with him he was so willing to help and be kind. Killing him was too much fun, and she wants to play with him again. Maybe when she has her powers back.
Neutral/Other - Maybe she respects them, maybe she hasn't decided what she thinks about them. They're a step up from trash anyway.
- Mia Fey - Human. But she came to take care of Tyki, which is something. Has no real opinion on her, yet.
- Shiki - He's kind to her but he's human. On the other hand he's willing to take her to dessert. She finds his apathy about the situation odd, but she doesn't mind him.
- Bazula - A strange, tall blue woman--aka, a troll. The appearance hardly bothers her, she's used to Akuma after all. Bazula is not human and therefore probably not trash, but Road hasn't known Bazula long enough to form much of an opinion. However the fact that the troll lady modified her toaster into a mechanical squirrel--while retaining it's bread toasting abilities, makes her think Bazula is both interesting and potentially useful.
Uninteresting - Boring for one reason or another, or just plain tedious to be around.
None yet.
Should go die in a fire - Honestly this would be like, everyone. Every human at least, who doesn't prove to be more interesting. People who fuck with her family probably also fall under this, but it's usually reserved for weaklings and trash as she sees them.
Everyone else. Er, unless I forgot to list them in one of the other categories.
Did I miss someone? Leave a comment and I'll add you!