[Depending on how observant Spike is he might note the blue kid avoiding his path whenever he's up and about moving around the Bar. Helix will take up a comfortable spot with a drink in hand and sort of watch him a little before casting his gaze elsewhere. He'll be keeping an eye on him though.
It's not out of fear of Spike of course and honestly he's been debating just saying fuck it and approaching him. Last time they spoke he very nearly staked him, not out of hatred really, even if there was some anger behind it, but to... prove a point if anything. All fun and games and they both do things dangerously for kicks.
Two peas in a pod really. At least n some cases.
But ever since his run in with Eric he's been a little edgy around anyone he KNOWS is a vampire. Especially since Aidan took it really hard, though he's sure he can have Tyki and other things to thank for that. Eric is the least of his worries really. And even though Spike has expressed no interest in feeding on him, he doesn't trust him and one can't be too careful.
Especially since everything that's happened to him so far, happened out of the blue. No pun intended.
Even if Spike's not paying attention he will at least start to feel Helix's gaze shift on him and off again throughout the night. Keeping tabs.]