The personality of Teko's is truly unknown, but later in the arc when Teko's soul is in Hinohara, he reveal to be rather infantile and oblivious to dangers or serious situation. Such as when Yataka confronted Teko (in Hinohara's body), he simply smiled thought they're playing much to Hinohara's annoyed and dismiss. Although Teko started off as a childish mascot, he later adapt to an understanding and helpful creature when it comes to helping and protecting his friends.
Teko has been with Nagu and Naru for unknown amount of time in the past. After Nagu submitted to Hinohara, Teko is now traveling with Hinohara's group.
- Teko can only say 'kuu'.