Leonardo is a lean mutant red-eared turtle with lime green skin, a golden mustard-yellow plastron, and a blue-green carapace with a bright teal design. He has black eyes, red markings over his eyes and the sides of his face, yellow marks on his upper arms and thighs, three fingers on each hand and two toes on each foot.
Leo wears a blue face mask over his eyes (with long tails down to his middle back), navy blue fingerless gloves (with blue trim) that extend nearly to his elbows and matching toeless socks that rise to mid-calf. He also wears a blue belt and strap over his right shoulder, with blue pouches on the belt and a Turtle emblem on the strap.
Leonardo is the wise guy. He’s charming and clever, and possesses a lighthearted quality that he often uses against potential enemies even as he fights them. He is prone to making jokes, sometimes at inappropriate times, and uttering one-liners which he believes "fire up the team". He can also be very arrogant, letting almost every win go to his head.
Despite his carefree tendencies, Leonardo is capable of being both sensible and serious when the occasion demands it. When he does, as in the events of "Origami Tsunami", he uses both his charisma and his intelligence to sway his brothers into listening to him. He also knows when to step up and take charge. However, it is implied in that he may not be as confident as he appears outwardly. Such is in the episode "Minotaur Maze", where Leo doubts his mystic ability and fears that he's incapable of harnessing it properly, and also in "Portal Jacked!", where Leo's insecurities in his ability and losing his brothers are expressed. Leo is also shown to care of his brothers (and to some extent with Donnie).
Leo has been shown to be more rational and skeptical, denying the existence of things like ghosts and searching for a logical answer. He also seems to be the least naïve out of his brothers, as they trusted Big Mama almost instantly, though Leonardo had his doubts on her background. Leonardo also seems to be the most exasperated by Raphael's antics, and lack of actual leadership skills. He can also be sympathetic towards other characters such as Bullhop.
Like his brothers, Leonardo began his life as a baby turtle in Baron Draxum's laboratory. Wishing to make mutant soldiers, the Baron used Lou Jitsu's DNA to mutate Leonardo into an anthropomorphic Turtle. He was taken from the lab by Lou Jitsu, along with his brothers.
A red-eared slider turtle, Leonardo is quick-witted and intelligent. He uses his sharp skills to beat opponents and find shortcuts around obstacles. And he always knows the perfect time to land one of his many one-liners!
- Portal creation
- Strength (Due to Mutation)
- Speed (Due to Mutation)
- Raphael: Raph and Leo are constantly butting heads, whether it is over wrestling or Raph's leadership skills.
- Donatello: Despite them being the middle brothers, Leo and Donnie don't get along well, with Donnie hating Leo's puns (even trying to get rid of them in Donnie's Gifts) and crazy schemes, and Leo thinking Don needs to loosen up. They do love each other, though, and will always have each others' back.
- Michelangelo: Leo cares deeply about Mikey. Though he will get annoyed by Mikey's competitive side and will participate if pushed too far.
- Splinter: Leo seems to know Splinter better than his brothers, as he was able to obtain a trinket from his "Do Not Touch" cabinet by taking advantage of the fact that Splinter passes out after eating milk and cake.
- Baron Draxum:
- Meat Sweats:
- Warren Stone: Leo is unsure who he is, but sliced him in half due to panic.
- Foot Clan:
- Foot Recruit: Leo seems to have a rivalry with Foot Recruit.
- Big Mama: Leo was the only one of the brothers to intuit that Big Mama was actually evil.
- Ghostbear: Leo accidentally defeated Ghostbear and broke his undefeated streak.
- "Dude, you gotta make it to rehearsal." - After Donatello's failed masquerade.
- "Soooo... You guys from Jersey?" - When faced with the just-transformed Jogger Guys.
- "You had to ruin Cannonball Day." - Before his Katana were destroyed.
- "Get- me- off- this- ride!" - Falling into the portal created by his sword.
- "You'd think as a birthday bot- you'd be a little more chill at a birthday party." - While fighting Albearto
- "And who doesn't love my one-liners- they fire up the team, right guys?" - During Donnie's Gifts.
- "Okay which one of you made Raph angry?" - Shell in a Cell
- "¡Vamonos, hermanos!" - Hot Soup: The Game
- "Why do we always have to dress up as grandmas, Donnie?" - Operation: Normal
- Unlike previous incarnations, this version of Leonardo is the rebel and self-proclaimed coolest turtle, instead of Raphael, rather than his normal role as the leader of the team.
- Since he isn't the leader, Leo is more laid-back than his previous incarnations.
- Leo also isn't the oldest turtle in this incarnation, in prevoius incarnations he is. Instead, he is now the middle & second youngest after Donatello.
- Since this version of Leonardo is a red-eared slider turtle, he sports visual marks (red stripes over his eyes and yellow stripes over his arms and legs) which are common and give this species its name.
- While he is taller than Mikey, a red-eared slider is actually smaller than a box turtle.
- He is constantly creating catchphrases for the group to use.
- Leonardo has the closest relationship with Michelangelo and takes him under his wing.
- According to a behind the scenes video, Leo is confirmed to have the smarts to be a leader, but seemingly lacks the maturity as he is more interested in enjoying life as a teenager.
- It is possible that this could foreshadow one of the major changes hinted prior to the series' premiere.
- Leo is the second turtle to be seen without his mask.
- A running gag with Leo is that he is constantly seen dabbing.
- Leo seems to have an interest in basketball as seen in "Hypno! Part Deux" and "Late Fee".
- Leo seems to know some Spanish.
- Señor Hueso's nickname for Leo, "Pepino", means "cucumber" in Spanish.
- Leo have been shown to cook as seen in "Bullhop" and "You Got Served".
- Though he flounders if under pressure as seen when he gives Boss Bruce a burned toast.
- Leonardo (Rise of the TMNT)/Gallery
- Leonardo (Rise of the TMNT)/Animations
- Leonardo (Rise of the TMNT)/Appearances