In my case, Rei > Elsa >> others
(Generally my favorite = Tsubasa & Mahiru & Rei, then relatively like Hime & Elsa, liked but not as much as previous characters I have mentioned = Lily & Yume & Rola)
(Not interested in Yozora & Yuzu & Ako & Koharu & Kirara & Aria… although I love Future Transit very much…)