The Slow Goose and the Grassworm

Second Daughter: Bianka · Durandal · Atagina

Durandal is the captain of Schicksal's current strongest Valkyrie squad, the "Blade of the Immortals," and the current wielder of the Black Abyss White Flower.

Durandal is the biological daughter of Siegfried and Cecilia. As a child, she stormed Schicksal headquarters alongside her father Siegfried to rescue her sister "K423." Later, while covering for K423 and Siegfried's escape, she unfortunately fell from a great height and struck her head, causing Kiana to lose her memory.

After losing her memory, Kiana was found by Ragna and sent to a Schicksal orphanage. There, Kiana chose a new name for herself—"Bianka · Atagina."

At age twelve, Bianka, already a Valkyrie, entered the Sea of Quanta with her adjutant Rita · Rossweisse, embarking on an unknown adventure.

During that adventure, she gained companions, stories, and the name "Durandal," while also absorbing a World Bubble into herself.

Today, Durandal remains active on the battlefield as Schicksal's strongest S-rank Valkyrie.

[Theresa: I never expected Durandal to be Siegfried's daughter. Their personalities couldn't be more different.]

[Durandal: I'm the daughter of Lady Cecilia and Siegfried? Then that means Kiana is my sister!]

Durandal, currently training at Schicksal, was extremely excited. She had always thought she had no family, never imagining she'd not only learn of her parents but also have a sister.

At that moment, the sister-complex genes inside Durandal had begun to awaken. She wanted to go to St. Freya Academy right away to see her sister.

[Kiana: So you're saying you're my sister? My sister is Schicksal's strongest S-rank Valkyrie!]

[Durandal: That's right, little sister. Once I finish my work for a while, I'll come to St. Freya Academy to see you.]

[Theresa: Durandal, you're actually coming?]

[Durandal: Yes, Theresa—er, no, I should call you Auntie now. Auntie, once I finish my training this period, I'll come to St. Freya Academy to see you all.]

[Asta: Am I the only one who noticed "K423"?]

[Himeko: "K423" doesn't sound like a person's name—more like a designation.]

[Himeko: Kiana, I have a guess. You said you were once locked in a glass tank filled with green liquid, right?]

[Kiana: That's right, other Himeko.]

[Himeko: If so, is it possible you were once used as a test subject for experiments? That glass tank was actually a nutrient pod. If I'm not mistaken, you don't have memories from early childhood.]

[Kiana: Indeed. I only have memories from after age eight.]

[Himeko: Then it all adds up. If I'm guessing correctly, your mother Cecilia gave birth to two daughters. The younger one—you, Kiana—was secretly taken away for experiments, and your designation was "K423."]

[Kiana: But why choose me?]

[Nahida: Let me take it from here. Based on available intel, the one who experimented on you was most likely Schicksal's Overseer, Otto. The reason was probably his interest in the power of Siegfried and Cecilia.]

[Nahida: From Sirin's information, it's clear that Lady Cecilia's family blood has a suppressive effect on Honkai, and Sir Siegfried also possesses immense power.]

[Nahida: Although Sir Siegfried's power hadn't fully awakened when you were taken, his family likely had records of wielding similar power in the past. As for Lady Cecilia's blood, that goes without saying. So you, bearing the blood of both spouses, became the target.]

[Kiana: So that's how it was!]

[Tesla: That's right. That's exactly the kind of thing that blond bastard would do.]

[Nahida: Of course, these are all just my guesses. We'll have to wait for the next answer analysis to know for sure.]

Third Daughter: Kiana · Kaslana

Kiana is a student at St. Freya Academy and a B-rank Valkyrie of Schicksal.

Kiana is a clone created by Schicksal's Overseer, Otto · Apocalypse, using the genes of Sirin and Durandal in order to revive the Second Herrscher. Her designation is "K423."

Later, K423 was rescued by Siegfried, and the father and daughter lived together in a remote village.

Consumed by longing for Cecilia and Durandal, Siegfried neglected K423. Until she turned eleven, K423 had not received a name.

It was only at age eleven, when K423 took the initiative to fight a Honkai Beast to prevent the injured Siegfried from continuing to battle, that Siegfried finally acknowledged her. He gave K423 the name that had originally belonged to her sister: "Kiana · Kaslana."

After that, Siegfried seemed to change, truly treating Kiana as his daughter. But a year later, while fighting a Honkai Beast alongside Siegfried, Kiana accidentally awakened the power of the Herrscher of the Void and lost control. To bring Kiana back to consciousness, Siegfried sacrificed one of his arms.

Siegfried then left Kiana. To find him, Kiana traveled alone from Europe to Senba Academy. There, she met Raiden Mei, and during the Third Great Honkai, she survived in Changkong City alongside Mei and Bronya. They were later rescued by Himeko, an A-rank Valkyrie from St. Freya Academy, who brought Kiana to the academy.

At St. Freya Academy, Kiana found her Auntie Theresa and made a pact: once she became an A-rank Valkyrie, Theresa would tell her Siegfried's whereabouts. From then on, Kiana became a student at St. Freya Academy. To this day, she continues striving to become the strongest Valkyrie.

[Kiana: I'm... a clone...]