Backstory: Catharina was adopted as a baby lizard alongside Leo, Raph, Donnie, and Mikey. She was raised as their sister, training under Splinter as a kunoichi. When it came to training April, Cathie spent quite a lot of time helping her. April was her first real friend, and Cathie wasn't very good at showing her appreciation, so she wanted to show her that she appreciated her and wanted to spend time with her.
Personality: Catharina is sassy and sarcastic and easily gets along with people. She tends to go with the flow instead of planning things out. She's chill and usually goes along with Leo's plans with little to no complaints- though she might put in a sneak in a snarky remark depending on her role- as long as they aren't absolutely insane. Cathie is pretty lazy, so if she isn't required to do something, she probably won't do it. More than anything, she likes to curl up in her room and take long naps, or sunbathe on a high up rooftop in New York where no one could see her. Despite her laziness, she can be quite competitive. She doesn't care about impressing anyone- she doesn't really care what others think of her- she just likes the fun of a lighthearted challenge. Overall, her attitude is similar to Mikey's, being laid back and a bit playful, though it is definitely toned down. She can be a bit awkward when it comes to emotions, and can sometimes come across as unsympathetic, but the truth is she's simply not very good at communicating feelings. She mostly shows her feelings through her actions rather than her words. She tries her best to be genuine and is rather good at reading the room, knowing when to joke around and when someone needs a shoulder to lean on.
Abilities: Cathie is strong, fast, agile, and stealthy, and her tail is just as strong as her arms and legs with the added bonus of being able to grow back. She's an excellent climber, able to stick to walls, is great at swimming, and is good at medical care.
Weapon(s): Naginata
Strengths: Like the turtles, she is physically more capable than an average human and knows ninjutsu, and is great at climbing, swimming, and patching wounds.
Weaknesses: Cathie is cold-blooded, and would do terribly in any sort of leadership role, as she struggles to take the initiative. She also has a hard time opening up about feelings.
