Question. Why does Garmadon have a tail and Wu doesn't? What is your headcanon regarding the oni and dragon parts of the brothers?
Okay, to start, we'd have to go back to the beginning, when they were both conceived (by accident) by FSM. Without the intervention of a second father, he just underwent mitosis and laid two eggs one day.
(Please, ignore the fact that I misspelled Mystake's name, dyslexia hits me hard with her.)
Even though they're a perfect 50/50 like their father, each ended up having more traits from each side.
Garmadon has more dragon traits, while Wu has Oni traits.
To this day, it's not known for sure whether Wu's markings gradually disappeared as he grew up or if he removed them himself.
He never gives a clear answer.
What is certain is that he continues to use his shapeshifting ability to this day.
Now, do Oni have tails? Yes and no.
They aren't born with tails, but it's not uncommon for some to shapeshift to have one.
Usually a thin, very long one. They also tend to adorn them with jewelry because they're ✨️✨️fancy~✨️✨️ (when they want to be).
Wu was born without a tail because Oni aren't born with tails, and he never felt the need to have one.
And since we're on the subject of headcanons for this family, I have to talk about the "Garmadon situation." This is long.
We've already established that Garmadon was born 50/50 with more of his dragon side, right?
Well, now I'll explain how the Great Devourer's venom and how the "turned me evil" thing enters in all of this, or at least how I interpret it.
No, the venom didn't make him evil.
What the Great Devourer's venom did was rather... "stimulate" his Oni blood, not instantly but progressively, to the point where he physically resembled an Oni.
When the poison left his body, he returned to how he was at the beginning, 50/50.
And when he was resurrected by Harumi, she only brought back his Oni side, right?
Well, what they didn't know is that over time, Garmadon's body would restore the dragon blood itself. (If my understanding of how blood works isn't wrong.)
Technically, by the time of Crystallized, Garmadon could have looked like he did when he was Sensei Garmadon, but no, he really grew fond of his Oni appearance, and he voluntarily decided to stay that way. (Don't tell Lloyd.)
As an extra:The Spinjitzu family tails are very strong and practically a third arm.
Like the time a very tired Garmadon lost 1-year-old Lloyd in his house for an hour, it turned out he had him pinned to his tail the whole time.
Well, I lied, not all members of the family.
After the Tomorrow's Tea incident, Lloyd's tail muscles atrophied.
Don't worry, with rehabilitation, he's managed to move it again and is doing well, just not able to support as much weight as he should.
