These headcannons mostly focus on the ninja's gender, sexuality, and disorders, I'll probably make a seperate post talking about their interests.

Lloyd is questioning their gender since they haven’t had much time to explore themself. They allow their peers to use he/him pronouns, but they prefer they/them pronouns (spoiler alert: Lloyd is nonbinary). Lloyd is demiromantic and demisexual; they rarely fall in love, and if they do, it’s only with someone very close. They have PTSD, OCD, BPD, and depression.

Zane is nonbinary; he likes to use he/they pronouns and doesn’t like being referred to as a man. He is pansexual and asexual. Zane’s father has autism, and he programmed Zane to have many traits similar to himself, which led to Zane having autism. Zane is sensitive to loud noises and doesn’t like being touched; he is trying to build different settings for his senses to turn off his hearing or feeling of touch when overstimulated. Zane also struggles with amnesia, due to his memory being lost multiple times and him subconsciously deleting traumatic experiences from their mind. Zane has trouble remembering basic information and recalling traumatic events from the past.

Jay is genderfluid; he is fine with any pronouns and doesn’t feel restricted by gender norms. He is bisexual. He has ADHD and generalized anxiety disorder, which he takes medication for.

Kai is transgender; he was a biological girl when he was younger and began transitioning at age 19, he uses he/him pronouns. He is bisexual. Kai suffers from bipolar 1, which he was diagnosed with and is now taking medication for.

Cole is transgender; he was a biological girl when he was younger and began transitioning at age 18, he uses he/him pronouns; he and Nya were the people to help Kai figure out he was trans. Cole is gay and suffers from PTSD and anxiety. 

Nya is Transmasculine and uses both she/her and he/him pronouns; she is not planning to transition biologically but makes an effort to look like a man if she feels like it. Nya is bisexual and has anger issues.

Pixel is biologically genderless, but she feels as if she is female. She doesn’t feel restricted to gender norms and uses she/her pronouns. She suffers from depression since she has a more challenging time feeling joy due to the way she was programmed. She is pansexual and asexual.

Wyldfyr doesn’t care about her gender; she hasn’t made an effort to assign herself a label, and she doesn’t care what other people call her. She is omnisexual and has ADHD and anger issues.

Sora is genderfluid and uses any pronouns; they are a lesbian, has autism, and suffers from depression.

Arin is cisgender; he uses he/him pronouns and doesn’t like being called a girl. He is aro/ace and suffers from anxiety, PTSD, and depression.

Geo hasn’t thought about his gender since he never felt restricted by gender norms, and he just allowed people to refer to him as whatever they liked. He believes he is genderfluid but hasn’t put too much thought into it since he doesn’t feel the need to. He is omnisexual and suffers from anxiety and OCD.

Garmadon believes they are cisgender but secretly feels more connected with being nonbinary. They have repressed these feelings for most of their life since they were scared of the dysphoria they experienced every time someone called them a man. They are bisexual, Garmadon’s Oni form has ASPD, and struggles to feel empathy for others. However, they have slowly learned how to be kind to others after the crystalized season.

Master Wu is cisgender and a straight ally; he finds nonbinary and trans people interesting since these terms didn’t exist when he was younger. Wu strives to understand his diverse students and wants to support them in any way he can. His students are happy to answer most of his questions about gender and sexuality. Wu suffers from depression.