Sae, the black haired one, really hated Ramon in the beginning and tried to make him leave with her appearance (since she´s unable to use make-up in a favorable way...)
Kain and Tomo are the siblings who know about Minahos real identity (even from early on)who he Shares the best relationship with.
That day, the three siblings were at home to keep an eye on sick Minaho, Ramon came by and except for Sae he was welcomed. Minaho is clingy with him and when Tomo started cooking some rogue vampires appear. That´s the deal.