|Date of Birth||N/A|
|Likes||Dropping large pillars from the sky, Playing horsey with Rinko (much to her dislike), Snacks.|
An ippon-datara (一本ダタラ?), a monopedal cyclops-like demon that lives in mountains. He is Ageha's accomplice that attacked Shizuku, Kaya, and Rinko at Yuto's grandparents' house and was almost killed by Shizuku until he was spared when the latter saw Yuto's Light Ferry ability. In his second appearance, he assumes a bipedal form with androgynous features.[ch. 24] After Rinko took him out to eat ice cream at Café Relish, he stopped the fight between Ageha and Himari at her request.
Sasa's anime incarnation portrays him as bipedal and his gender has been changed to a girl. Also, like Ageha, he/she becomes a supporting character following Shuten-dōji and Tama's appearance, and plays a key role in restoring Himari's Yasutsuna by shooting it with his/her eye, something that was originally done by Kuesu in the manga by recreating it through some sort of time magic.
In the anime Sasa is shown to be child-like, asking to "play" and to be given a piggy back ride. She is also shown to like sweets.
It is unknown how Sasa and Ageha met each other but they became very close friends.
Sasa can summon giant pillars from the sky to crush his/her opponents, increase his/her mass at will, and fire energy beams from his/her eye. It is mentioned by Ageha in the anime that his/her kind are excellent swordsmiths and as such, can repair and restore broken swords to their original condition and strength.
- He/she is child-like in the anime while in the manga she is not.
- For some unknown reason, Sasa doesn't wear underwear beneath her Japanese clothes in the anime.