Honestly she has just about everything I could ever want from a vtuber.
Good personality usually mature, levelheaded and humble when it matters but able to be silly and fun and cute and mischevious too.
She's great at interacting with her chat and bouncing off it can get that fun mutual light hearted teasing back and forth going.
Has lots of long solo streams and doesn't just play the same shit as everyone else is playing.
I love her choice of games they work so well for her things like Xenoblade, 13 Sentinels and Persona give her great content to react to and her reactions to it are often hilarious and very entertaining.
She gets deeply invested in the characters of the long JRPGs and VNs she tends to play.
Has a great voice thats very soothing to listen to I think and her laugh is sunshine into your life.
Also a very strong singer, and does karaoke on a fairly regular basis.
She is generally very respectful of her fans and isn't moneygrubbing or baiting for donos at all, quite moral and principled when it comes to this stuff.
Has an understanding of and respect for general v-tuber culture, and an long time interest and love Japanese culture and anime/manga/related interests.
She manages to create this very welcoming and warm atmosphere in her streams with her friendly disposition.
Does nice bits of fanservice here and there without leaning too heavily into it for my tastes.
In short she is great, I could probably go on and on writing even more things I think are great about her. Dumb things like "collabs with males" or whatever never bothered me having watched Niji for a long time before EN. I feel bad for people that miss out on such a great streamer over such a silly thing.