Tech-savvy turtle brother who invents gadgets and solves scientific problems.
Splinter is Donatello's adoptive father and martial arts teacher.
The plot identifies Splinter as the adoptive father of the turtles and shows him training the group in ninjutsu.
They are brothers and coordinated teammates within the turtle family.
Leonardo and Donatello are both members of the four-turtle team trained and raised by Splinter.
Their relationship combines sibling loyalty with combat cooperation.
Raphael and Donatello return together to defend their lair and fight the Foot Clan as members of Splinter's turtle family.
Donatello is an active opponent of Shredder's criminal campaign.
Shredder orders the Foot Clan to attack the turtles and later confronts the full turtle team during the rooftop battle.
Explore the full interactive character relationship map of Teenage Mutant Ninja Turtles
Related entry on Wikidata (Q106540398), public domain (CC0).