I feel like Lacey would be initially really uncomfortable around the main canon crew where they're at right now. 

"These guys are [i]heroes[/i]."

She'd be uncomfortable right up until she said something objectively blunt and it'd be like ripping off a bandaid. Her attitude would switch, she'd barrel on. If Lacey were to meet them when they were all the same age, she'd probably get along well with Maka. I don't think Maka would appreciate Lacey's tactlessness however. 

While with the others, Lacey wouldn't stand for pre demon sword Tsubaki. It'd be a weird association with how she saw herself when she was friends with Vanessa Amsel. While she'd come to appreciate Tsubaki's apparent maturity after the fact. 

Lacey would have fun speaking with the Thompson sisters. Swap hair styling tips with Liz while trying to spar with Patti. She'd be interested in their rough, scrappy street fighting style. With Kid she'd struggle to find something to talk about with him, though would sympathize with his nerotic episodes. He might like the shape of her soul buuuttt if they were to talk about some of his own objectives as a new grim reaper they could find some common ground. 

With Black*Star she'd immediately admire his ridiculous perserverance. His totally unorthodox way of gaining power and strength. 

I can see Lacey getting into a snarky low key debate with Soul, both able to pull out some barbs. 

Need to think about how the twins would relate.