Leonardo (future) (Mirage)

Leonardo of the future is a Buddhist monk (bodhisattva). He wields a carbon Bokken, a gift from Donatello for his one-hundredth birthday, which produces bio-electricity based on his own willpower.

This version of Leonardo first appeared in Loops, summoned by Pai-Doth Noor to save the god's younger self, along with three other time-displaced versions of Leonardo.

In Swan Song, Leonardo is revealed to have had a romantic relationship with Raven Shadowheart, the superheroine known as "Radical". Radical's arch-nemesis, Complete Carnage, appeared from a brick wall one day whilst she and Leonardo were out for a walk, and snapped her neck, killing her.

Many years later, after attaining monkhood, Leonardo sees a news report of hostages being held in an impenetrable building of organic rock in Hong Kong. He had come to forgive Carnage, but seeing the villain kill one of his hostages, plus his heartless taunting of Radical's murder, reignites an anger in Leonardo and he kills Carnage.

Decades after this incident, an elderly Leonardo is implied to be preparing himself for his own passing.