IT'S PEAK!!!!!
Very, very fun subversion of common fantasy tropes/isekai set up.
The use of 'evil' to talk about and explore gender dysphoria and gender envy is very well done, esp with how it intersects with the character's actual trans identity and the judgement she deals with. The sword sisters are awesome and have great personalities that clash well with Saden's.
(spoiler >)
The ending is so so so good. Trans healthcare sucks because it's medicalised humiliation rituals, but it also sucks because there's no procedure to physically meld yourself to your toxic hate-crush so you can become an amalgamation of your toxic obsession that ends up being surprisingly functional.