The Master of Ragnarok & Blesser of Einherjar: Albertina & Christina

Albertina (green hair) is one of the princesses of the Claw Clan and the older twin sister of Christina. In contrast to her sister, she is innocent and slow-minded. She is an Einherjar who's rune allows her to move at superhuman speeds and conceal her presence a little, making her an excellent assassin. She became Yuuto sworn daughter merely because her sister did so as well. Christina (purple hair) is the younger twin sister of Albertina. In contrast to her sister, she is mischievous and intelligent. She is an Eingerjar who's rune allows her to conceal her presence and increase her speed a little, which, along with her information gathering skills, makes her an excellent spy. She became Yuuto's sworn daughter due to her respecting his leadership skills.