suddenly coming up with an au idea where Lloyd and Harumi are twins and they get split up at birth where Harumi ends up in the foster system and Lloyd ends up in Darkley's and Harumi had no idea of her heritage until after her adoptive parents got killed and she did some research and came across the fact that Lord Garmadon had, in fact, two kids which were her and Lloyd

also she finds out it was Lloyd who released the serpentine and she gets really bitter and angry because why did she have to suffer losing her parents while Lloyd went on to be the green ninja after his actions and even built a relationship with their father and then she gets even angrier when she finds out he was sacrificed in the battle against Chen and his anacondrai army so she finds a way to resurrect him

I also like to imagine that with the royal family they put a lot of pressure on her and so she felt that she was unfairly treated and set up to high expectations while Lloyd got to have fame and fun and adoring fans (miscommunication jealousy trope yay) but also Lloyd would think the same of her he'd wonder why she did all this when her time with the royal family seemed so "perfect" until eventually they actually talk to eachother

there wouldn't be any romantic subplot in this one nty (especially with tomorrows tea Lloyd would be a lot older than her here) but Harumi hides that she's Lloyd's sister until the Oni temple and she basically tells Lloyd only those of Oni blood can get the mask and then immediately reaches in and grabs it and reveals who she is. idk I just really like this idea imagine the ANGST potential

and also there would be a ton of parallels between Wu and Garmadon especially with fate/destiny and all that and the knowledge that your own sibling is/has the potential to be the greatest evil. and when Garmadon is resurrected and chooses Harumi over Lloyd she thinks she's finally won and gotten everything she ever wanted

after the whole Oni trilogy is over Lloyd asks Garmadon why he never mentioned he had a sister and Garmadon states that he didn't know what he could've even done with that information because Harumi was long gone by now and had a completely different name and had no record of her birth (same with Lloyd he technically doesn't exist lol) and he wouldn't know where to find her, he just didnt expect that she would've found out about her heritage before any of them were able to find her

Sensei Garmadon definitely felt remorse over never being able to find his daughter, but I think Emperor Garmadon would be conflicted about it and when he did learn how he cared for things (I don't think he had to learn how to care, he just had to learn how to process caring for other people and his more positive emotions because the only things he understood were anger and hatred)