Hamato Yoshi (The Next Chapter)

Hamato Yoshi (also frequently referred to by his alias Splinter or Master Splinter) was a mutant rat, ninjutsu sensei, known for being both the adoptive father and sensei of all four of the Ninja Turtles, the long-lost biological father of Hamato Miwa, husband of Tang Shen as well as the adoptive brother and sworn enemy of The Shredder (born Oroku Saki).