You can thank E.K. Johnston for this. "Sister" was introduced in the final novel of the Queen's trilogy.
I have no idea if she is LGBTetc herself, but she seems to have a fetish for wanting to include it in her Star Wars writing.
I read
Ahsoka and disliked it for different reasons, but Johnston's openly-expressed remorse that Ahsoka didn't share a lesbian kiss with a female character didn't help either - especially with how convenient she made it a possibility when the character told Ahsoka "I could kiss you," when the latter recuses the former.
Plots such as this and characters such as "Sister" feel like they are trying to make a contemporary social statement as opposed to telling some sort of science fiction story.
Note Specimen "Russel Greer" Clone 99. The drooling Hunchback they kept around to mop up the shit in the toilets.
I'm okay with a character such as 99. As much as the cloning process went wrong with him, he was still deemed functional enough to do the not-so-glamorous work in Kamino since all the perfect clones were out on the battle field. As
@Lazy Drei previous stated, 99 proves to be a hero in that season's "Kamino Arc" when he dies helping his fellow clones drive away the droid invasion intended to allow Ventress (I believe it was) to steal Jango Fett's DNA sample that's providing all the clones. If I also recall, the clones fighting beside him him posthumously considered him a brother for showing bravery in battle and going above and beyond what was ever expected of him - a theme we won't see in Disney Wars any time soon.
Sister's character is little more than an attempt to pander to LGBTetc fans who are rabid on social media about how the franchise needs more such characters.
Are we sure the men writing star wars are not pooners?
Opposite sex relationships are apparently too problematic and triggering for Disney Wars. Even if they aren't pooners, Disney is definitely recruiting LGBT writers or their "allies" to crank out the current batch of content nobody but chronic consumers want to see.
If you are wanting to get into reading Star Wars books do yourself a favor, stay far away from anything with the Disney logo on it and stick with the classics.
This is why my last Star Wars purchase was an old copy of
Splinter of the Mind's Eye. I hadn't read it since I was a kid and I was glad to have purchased it and to have the opportunity to reread and better appreciate it as an adult. Disney content doesn't even come close to the classic content.
(Edits for spelling and clarity.)