It is for sure....weird. It looks like you tacked on the two animals instead of it being like something that was done naturally. Maybe some color differences...but it needs something to make the head match the body somehow, so it looks like it belongs together, even if they are different animals.

"Friendly" at least in a classical sense is done with curvy models, and heads bigger than normal. I'm not an expert on the subject but it seems you have that down at least. I think the texturing has a bit of a "generic" feeling though. Maybe if you did some more details and color variation it would work better.

Fur- Honestly, it doesn't look like fur to me. But I think the geometry forms aren't bad, rather as you see Blender is using a pretty generic spec/diffuse shader from the looks of it. Plus, you don't appear to have things with smooth shading, rather flat shading, and then you use way to many polys in order to smooth things out. If you switch what needs it to smooth normals, you can get a nice smoothly curved surface, and lots less polys too.

And geometry-I think it is a lot of it, especially that napkin. What engine are you intending on using to create the game? If this is the only character on screen and not much else, I'm sure it is fine. Mobile devices tend to have more fill-rate issues than PCs as far as I understand it. But even if you can get it working, you are probably better off trying to optimize what you can. For example, I think the bear fur would be better as smooth geometry, and then this high poly fur(sort of) could get baked into a normal map. Generally a normal-mapped shader is cheaper to run than all of those polys. That napkin is also so small, that it doesn't warrant that many polys either. It has more than the rest combined!

The inspriration one you used has a cartoon style, and the at least in that pose, there is a clear connection between the white in the body and in the face, so it kind of matches. In your model, there is a clear division line between top and bottom, and at the least in those renders, the style doesn't work like that somehow. It may be something that can be helped with shading(since it is going into Unity3d anyway) but it maybe something where you are better off doing a bit different texture for it. Maybe the white of the face should run down the neck all the way into the belly. Maybe if you somehow on the neck make a blend of sorts instead of having the straight line cutoff like that.

About particle systems, they won't work in Unity anyway. I think I'd like to see what you are talking about as far as "depth" channel. Did you paint a bump map? If so, you may need to bake that into a normal map for Unity to use, depending on the shader you plan to render with.

Well, the character looks better now to me, as it is matched. I don't know your game idea very well though to be able to really suggest things like enemies. I'd say as long as they fit, you are probably fine.