Hey! Wait can it be violence?
These creatures use to make no sound, as you said no talking animals. They were a forgotten evolution of us humans. They could run at a high speed with confidence towards anything no matter what it is. They existed, or do they? There is only one here left. Humans captured it and tested it, saying that they can survive more that millions of years (don’t ask how). These don’t have much strenght, but they are fast and fearless. They have many parkour skills. Humans has used this one in many wars and they succeeded. But now its in cage. If allowed, I will it out.
[I have added some details on this.