Takehito Shirahane

白羽岳人

Yukina’s father. He correctly deduced that the ogres of legend were in fact extraterrestrial beings, but he mysteriously disappeared 8 years ago. [Spoiler] Zeru revealed that they became friends and bowed to work together to stop Efy Dolg, but tragically he died in a snowstorm before Zeru could help him. [/Spoiler] (Source: Wikipedia)