I am interested. I'm not very familiar with power rangers at all, but being set in an original version helps, since you described the backstory so well. 

I was thinking blue ranger. I'm not sure about the third animal, but I thought peregrine falcon. I thought it would be cool if they had a lance as a weapon, and flew at enemies at high speed. 

But I do see that there's a lot of birds going round, so maybe I'll rethink it.