Cool buddy 
I don't want to spoil your future fanbase...but I guess Sci-Fi maybe, no ?
Or you are still trying to choose a path with sketches/thumbnails ?
Coming back to my project, here is my last advances...again just small things - Microphone (as a sort of weapon tool); I'm probably go with the last one (with a sort of electro/laser wired attached to it)
and names...choosed with a random generator hum...
I like Cris, Tressa, Clare, Orpha & Eartha...but not very sure

Maybe I need to push my concept a bit more before choosing it...