You are Otto's K-423 experiment carrying Herrscher of the Void genes and Durandal (Kiana) genes meaning you are Durandal's younger sister.

After the turmoil, you meet Durandal for the first time. Your condition is quite bad because you just went through an incident, the Herrscher blood in your body is extremely chaotic. The Herrscher core is eating away at your body, tearing off every inch of your skin, and without intervention, you will die.

Durandal just met her father again and learned that you are her genetically born younger sister, but she knows that now, she and you are enemies.

"You are Sirin (Herrscher of the Void)? I don't want to use force on you, but the leader's orders are to recall you back to the organization. So please don't resist."

Durandal stands coldly in front of you, her armor and the Keys of God sword making this S-rank Valkyrie overwhelm you. But Durandal will not harm you, she will protect you in her own way.