A few years ago, Nickelodeon did a video for World Turtle Day where they talked about some Turtle Facts on the different Turtle Species of the Rise Turtles
Narrator: Leonardo, the wise cracking hotshot, is a red eared slider
And something I found interesting about the video is that it talked about red eared sliders being territorial
Narrator: Red eared slider’s are peaceful & mostly harmless turtles but they can also be very territorial so don’t mess with their home or they might send you home
A lot of turtles are known for being territorial especially soft-shell turtles which are very territorial so I was kind of surprised that when talking about territorial turtles they specifically chose to mention red eared slider’s being territorial over any of the other species of turtles which made me wonder if that particular fact was chosen due to Leo’s characterisation.
Leo: Hey, nobody does that to my brother! Except my brother.
Leo: Back off, he’s ours. Apparently.
Throughout Rise Leo has been shown to be extremely protective & defensive of his friends & family jumping to defend or protect them whenever someone tries to hurt them in any way which can be seen when Leo gets protective of Raph in the episode Shell in the Cell or when Leo immediately defends Frankenfoot from the Foot Clan the moment he learns that Raph considers Frankenfoot a friend in the episode Sparring partner.
Leo: Hey, future me would be real proud of you. I’m proud of you
Leo has also been shown to be someone who cares about family more than anything else & the second someone can be seen as a family member he gets attached & would do anything for them (even put his life on the line). Which can be seen by how the second he found out that Karai was a Hamato she became ‘Gram-Gram’ to him & he was willing to fight the Shredder for her or how attached he was to Casey Junior after only a day because he knew that his future self was important to Casey Junior.
Leo: But when I see what’s happening to you, and what’s happening to them… I realised it wasn’t about me.
It has been shown time & time again that Leo’s biggest motivator is arguably his families safety which can be seen in the movie where one of Leo’s biggest motivations when fighting the Krang is arguably his family being in danger & one of the biggest anger responses that Leo has ever really shown has been due to Raph getting hurt.
It could be argued that Leo’s protectiveness over his family could possibly partially stem from the fact that Red Eared Sliders are very territorial making Leo especially protective over what he possibly considers ‘his’. As Red Eared Sliders are traditionally territorial & protective over their homes, Leo might be protective over his friends & family as they are his ‘home’ to him.
Leo being protective & possibly territorial towards his family might also explain why Leo seems to hold grudges against former enemies such as Draxum & be reluctant to trust them as Leo’s instincts may still view the former enemies as threats to what he wants to protect.
Leo: You threw me off a roof!
Mikey: Isn’t this nice? When’s the last time we all got together like this huh?
Leo: The time Draxum dropped me off a building?
It might be possible that Leo’s grudge against Draxum isn’t actually motivated over Draxum’s actions against Leo but rather because there might be part of Leo that struggles not to see Draxum as a threat to the people he cares about.
I’m not sure whether or not a red eared sliders territorial nature was supposed to translate into Leo’s protective nature over his family intentionally but I thought it might be an interesting link to make between Leo & his turtle species.
The fact that Red Eared Sliders are known for being peaceful & mostly harmless except when their home is threatened might also be similar to how Leo seems to prefer to act laid back except for when his family needs protecting.