One thing that appealed to me is how some could use their abilities and how sneaky some are.
Not all would be wondering in packs perhaps a few could break out of crystals or rocks while others take cover behind pillars and walls etc.
I like the idea that the sneakiest of them have cloak tech where they appear to phase through the walls.
The red part on the back could pulse the closer they are about to go bye bye kind of like how in the predator movie the self destruction sequence.
Also the brighter the light on their back is the more enraged they could be and the dimmer it is the more calm they are.
Particularly like the green eyes glow, i like that to be subtle at first and at night you see only the eyes followed by the back light in what ever state the tsihu could be in.
Once the sound is added with this make it even more better because i like sounds particularly odd one's or hightech sounding that add to what kind of tech/equipment these tsihu would use compared to us.
Some images:
Band of Tsihu's they say see you!
Tsihu is the wall! Active camo
Tsihu hard stop, avoiding rocks!
Tsihu in the dark, sometimes the heat is too much.
Tsihu Guard, no one steps into our territory!
Tshiu is free aah follow the light!