Also known as Shōjō, Hsing-Hsing is a sea spirit from Chinese lore. He has a red face, hair, and a fondness for alcohol. One story has them giving a boy the sake that can heal his father, with a neighbor stealing some of it and being poisoned since he wasn't pure of heart. It's name is another word for orangutan.
"A monkey-like creature that can speak human languages in Chinese and Japanese folklore. Judging from their red faces, it is believed they like liquor, and can be easily captured by getting them intoxicated."
A pack of thirteen Hsing-Hsings that appear in the New Game PlusChallenge Quest, Catch the Sake Thief. They are stealing the people of Blasted Tokyo's limited sake for themselves. They appear in waves during the battle, with two in the first wave, three in the second, and four in the third and final waves.
Hsing-Hsing is a angel on Shugyōja Road, where he seeks to train himself. After a training battle with Jin, he realizes he can become much stronger and asks for them to meet again in the future. Traveling to Future Tenkai will have Jin meet the much stronger future Hsing-Hsing, who has become much stronger since they last fought. After their second battle, he realizes that there are other paths to becoming strong and joins Jin.