What are the blue stars

[ToniG]

…and what are they good for and where are they?

Topic

[e5c4p3artist]

They are XP that level you up. They are not accessible in your inventory or anything, but if you look at your profile and see what level you are, your blue bar (same color as the stars) will show how close you are to the next level. You get stars by fighting (missions, arena, events) and will level up when you get enough.