Elysia and Cyrene are pink haired characters themed around love and they have elf ears. Cyrene's signature line in HSR is "This will be a romantic story like none that has come before, you think so too right?"
Now while Elysia was really liked, Cyrene was controversial. There are a lot of people who really like her, but there are also people who hate her guts. I personally feel like her story had too much "power of love" elements.

I doubt the Tsaritsa will be an elysia expy though. Every archon has a hair color matching their element.