Who is Eva u guys r always talking about her. So who is she?????? Help me

Eva was an Irish mermaid in 1740. She was turned into a mermaid in the same sea cave as Bella Hartley. There is a chance that she also possessed Gelidkinesis/Substanciakinesis/Mecokinesis. She created the original Tower of Light when the comet was first heading towards earth. She was never seen afterwards, so she either was; destroyed creating the Tower of Light or she just went away after. The comet was named after her as a thank you. She is only mentioned in "Graduation"

She got destroyed