Anything

With each other.

Trens sleep three times a day, having a different circadian rhythm than most. They are swift, intelligent, and overall, skilled in psychological warfare. They are most active during twilight. One in ten million is attuned with kitsune and has corresponding powers.

They are known to be cunning and wily, and sometimes as tricksters, They are unafraid of hard work, but they are perceived as lazy by others because they sleep three times a day instead of once (that is, they sleep in shorter cycles, but often during times others would be awake). They keep large caches of food hidden in their territory, keep small families and often live alone, and build extensive underground dens.