Leonore

A sleepyhead who was born in an alternate dimension located at Meer's heart

The place she lives in is filled with books so there's nothing else she could do but to read them

The books were filled with an omninous aura telling stories of someone(?)'s life and they just keep piling up day by day

Getting tired of that daily routine, she went through a breakdown and begged for someone to let her free

That moment, her wish was granted 

She woke up in a different world where she found Shiro lying unconscious beside her