Tengu is a perverted little boy-loving mountain god. He has no interests in little girls.

Since long ago he wanted to be a teacher in the human world, but when he applied for a job and wrote "I like little boys" at the question "What is your motivation?" he didn't get accepted.

He always wears a mask and would never take if off in front of people. Behind his mask it's filled with beauty and anybody who sees it might lose his memories. Kohina once saw his face a little bit and didn't got affected by the memory lose and since then Tengu started to like Kohina.

(Source: Gugure! Kokkuri-san Wikia)