Tengen, often referred to as Master Tengen is a supporting character in Jujutsu Kaisen. They are an immortal jujutsu sorcerer that remains within their chamber; the Tombs of the Star Corridor at all times in order to reinforce the barriers that protect both Jujutsu High locations.

Master Tengen is also known as the "Star". They were responsible for preaching the foundation of jujutsu sorcerers and spawning religious groups that worship the Star as their deity.

Although Yuji Itadori looks like your average teenager, his immense physical strength is something to behold! Every sports club wants him to join, but Itadori would rather hang out with the school outcasts in the Occult Research Club. One day, the club manages to get their hands on a sealed cursed object. Little do they know the terror they’ll unleash when they break the seal…
 
(Source: Viz Media)
 
Notes: 
- Ranked 1st in Japan's Bookstore Employees Top Manga of 2018. 
- Nominated for the 25th Annual Tezuka Osamu Cultural Prize in 2021. 
- Nominated for the 65th Shogakukan Manga Award in the Shounen Category in 2019. 
- Chapter count includes extra chapter.

The second season of Jujutsu Kaisen. 
 
The past comes to light when second-year students Satoru Gojou and Suguru Getou are tasked with escorting young Riko Amanai to Master Tengen. But when a non-sorcerer user tries to kill them, their mission to protect the Star Plasma Vessel threatens to turn them into bitter enemies and cement their destinies—one as the world’s strongest sorcerer, and the other its most twisted curse user! 
 
(Source: Crunchyroll)