Hakua Berserker Bladefield serves as the fourteenth princess of Bladefield, a minor European principality. She is the younger half-sister to both Nanami Knight Bladefield, the thirteenth princess, and Souta Hatate (also known as Souta Bladefield). All three siblings share the same father but have different mothers, each of whom is Japanese. Interactions between Hakua and Nanami are infrequent, leading them to maintain a formal relationship where they typically address each other as "the fourteenth" and "the thirteenth".

Distinctive silver hair cascades in twin braided pigtails, secured with black ribbons. Her eyes shine with a lilac-purple hue.

Hakua's personality reflects her sheltered upbringing as the youngest princess. She received considerable affection and tender care from the king, resulting in limited exposure to the outside world and a general naivety about societal norms. This contrasts with Nanami's more experienced outlook. Hakua exhibits a habitual speech pattern where she occasionally repeats the last part of her sentences.

Her background indicates minimal direct involvement in the primary events surrounding her siblings and the Quest Dorm. Exploration of her character focuses more on her familial position and inherent traits than on active narrative development. Trivia notes suggest a possible implied brother complex toward Souta Hatate, though this remains an aspect rather than a detailed plot point. Her documented role remains confined to the established familial context and personality traits.