Are they his pets?
Tails is Tiny for a fox.

No, I haven't really made it clear beyond a line in the first comic implying that they're a group of animals that repeatedly show up to "battle" him (convinced that he's a villain for some reason). The comics are a little vague and just the basis for an animated short I'm working on which will be more clear. And yeah, haha, he is tiny, it's a little weird. I had considered making him proportional to a real young fox (even had thought of rendering them all realistically which would have been kind of funny in its own way I think), but for what I wanted to do it worked better to have him be to scale with Sonic and Knuckles. I've been playing it pretty loose with all of their sizes really, I think Sonic is about twice as big in the first comic as he is in the third, and they're all super-tiny in the Roomba comic.

You have a YouTube channel?

Yeah, though it isn't active yet. Hoping to finally launch with something within the next month, perhaps with the animation based on these comics if its done soon enough. But might launch with another of some other smaller projects I'm working on.