I really love how both Remilia and Sakuya's eyes take a style very similar to Kouta Hirano's vampire eyes. This Rainmaker series has quite a few subtle nods to different works.
The Immortal from the Moon
Yagokoro Eirin
The Vampire who manipulates fate
Remilia Scarlet
Ghost Princess, Inviter of death
Saigouji Yuyuko
The Apostle monk who escaped from Makai
Hijiri Byakuren
