Himeko belongs to Saint Freya Houkai Fighting Strategy Unit, while also the Valkyrja Squad Fifth Platoon Commander-in-chief. Her rank is Lieutenant Commander. She is a good captain who is fully respected from her subordinates, able to perfectly carry out the strategy, deal calmly under any adverse circumstances.
The following year after her father’s death, she responded to call of the “Valkyrie Project” of the Houkai Fighting Strategy Unit Training Program. With her natural abilities and excellent understanding, she passed through many battles and became the existence called “Ishtar of the battlefield”. In addition with her calm deposit nature, precise judgment, superior leadership, she always emerges victorious in every one of her battles.
Due to not having the resistance against the Houkai energy at birth, Himeko was forced to have her body transplanted with artificial Stigmata developed by Shicksal, in their “Valkyrja” project, a counter measure to fight against the Houkai. However, as the result of having her body remodeled, plus the side effects from the artificial Stigmata combined with the Houkai Energy taking a toll on her body, it has been declared that she only has one more year to live.
Current age as of Honkai Impact 3rd's start: 27.
Himeko perishes in battle with the Herrscher of the Void, suppressing the Herrscher and allowing Kiana Kaslana to regain control of her body, but at the cost of her own life.
Himeko currently has seven Valkyrja forms available with one exclusive to Star Rail: Battle Storm: Himeko's first battlesuit after joining Schicksal. However by that time, Schicksal doesn't have any general-purpose battlesuit. Valkyrie Triumph: Special Far East Branch battlesuit with cutout between her clothing's hips. Scarlet Fusion: A special Valkyrie battlesuit consisting of a red futuristic bodysuit. Blood Rose: Rose-themed battlesuit. She wears a torn sleveless dress and a small hat. Arctic Kriegsmesser: A younger Himeko wearing a winter-themed outfit. Vermillion Knight: Godsbane-class battlesuit hidden in Helheim Labs and the last battlesuit used by Himeko before her untimely passing. Himeko: An alternate-reality Himeko featured in Honkai: Star Rail.
