chaoticshambles- the first person who showed up and comforted her/helped her figure shit out when she arrived in the Fac, so he's secretly pretty important to her. Also, due to the fact that they had some smoochy time in a meme, she thinks he's pretty hot stuff.
queendiclondius- they hate each other, pretty much. Heather is a huge brat and Lucy is snippity, and the result is EPIC HATE TIME and lots of catfights and glaring matches.
hurtandscared- oh boy, this is a complicated one XD since Heather WAS Alessa at one point, she sorta feels bad for her in almost a sisterly way, and she's really fond of her deep down even if she acts pissy with her. On the other hand, Alessa ABSOLUTELY HATES HEATHER and wants her dead. And not in a "I'm just saying this because I'm mad" sort of way, either. Alessa is frequently plotting to kill her.
liesbysmiles- She loves his hair... it's been dyed blue, and she got to braid it. They've been drinking Cokes together and just kinda hanging out. Heather found his eyes for him when they were missing during an experiment. He's also the first person who's ever actually flirted with her.
psionichax0r- Heather knew him and trusted him during her FIRST stint in Fac, and so she still trusts him now despite not knowing him that long and despite how weird it is for her to trust people right now (since she doesn't really remember when she was here before, so it's like he's almost a complete stranger). She promised to let him help her if she ever needed it, and they pal around and bullshit together. They've gotten really close lately.
mochi_hime- TERMINATED they're gal pals <3 they do things like giggle and paint each other's rooms, and Usagi's endlessly upbeat personality cheers Heather up when she's being all doom and gloom. They've decided to keep reminding each other to stay positive.
truepsychictale- he helped Heather cope with her first week in Fac, and has kinda just been... benevolently watching out for her and cheering her up because of her connection with Alessa. He also gave her her katana, which is kinda her most prized possession right now.
daddys_hit_girl- Mindy understands Heather's current ouchies over having recently lost her dad, and she's been helping her take out her pent-up emotions and all manner of furniture with her arsenal of amazing weapons. She's also probably the only reason Heather survived the
Saw incident and_another_war- he's a fellow veteran of Silent Hill, and so Heather warmed up to him fairly quickly. Not a lot of people UNDERSTAND, you know? They've just been generally bouncing their respective problems off of each other.
kingroadie- they're sort of pals, but they're not close yet, really. They've had some good laughs, though.
harry_b_dresden- they're pals. He reminds Heather of her late father, so she's very attached to him.