TV-Series
Description
Mui Aiba, a pureblood magician born into the prestigious Aiba family, demonstrated early magical proficiency. Her childhood involved intensive training alongside her older brother Tsuganashi Aiba, forging a deeply bonded relationship. This bond became central to her motivations after Tsuganashi's abduction and brainwashing by the antagonistic group Ghost Trailers, who actively seek her capture for undisclosed reasons. The disappearance of one or both parents at an unspecified point further shaped her background.

Her personality blends shyness and endearing vulnerability with intense determination, particularly concerning Tsuganashi's rescue. This stubbornness drives her to take near-fatal risks, refusing retreat despite overwhelming danger. She is easily frustrated or deceived, as when her brother manipulated her into publicly confessing romantic feelings for Takeshi Nanase. A notable trait is her "giant sweet tooth," which once caused her to fall down stairs while rushing for pudding.

Physically, Mui possesses thigh-length black hair secured by a pink triangle hairclip on the left side and deep pink eyes. She is notably short and petite, though proportionally "decently well-endowed." Her standard attire is the Subaru Magic Academy uniform: a white shirt with blue accents, brown miniskirt, green plaid tie, brown loafers, and thigh-high black socks.

As an S-class magician, Mui wields **Acceleration Magic**, specializing in lightning-based spells: **Melt Projection** (a blinding flash of light), **Full Meteor** (a meteor-like blast of accelerated magic), **Electric Shot** (an electrically charged projectile), and **Thunder Guard** (a defensive lightning shield). She also employs utility spells like **Float** for flight and **Protection** for barrier creation. Her magical focus, the Aspect, is a black gun named **Arthur**, featuring an extendable barrel for enhanced spellcasting.

Key relationships define her development:
- **Takeshi Nanase**: After accidentally transforming him into a magician, Mui feels persistent guilt but gradually builds trust. Romantic feelings develop following an accidental kiss, hinted to be reciprocated.
- **Tsuganashi Aiba**: Her devotion to restoring his memories and personality drives major plot arcs, showcasing a "brother complex" in her protectiveness.
- **Kurumi Isoshima**: Initially distrusted by Kurumi due to jealousy over Takeshi, their tense relationship evolves into friendship despite lingering rivalry, exacerbated by Kurumi’s envy of Mui’s physique.

Mui’s actions consistently focus on Tsuganashi’s rescue. She defies academy orders to pursue him alone, triggering a confrontation where her "indomitable desire" nearly results in catastrophic outcomes. After his recovery, she supports Takeshi against Ghost Trailers and participates in battles like the **Battle of Pendragon**, though her agency often ties to others’ conflicts. Her character exhibits minimal standalone development beyond resolving her brother’s arc and navigating romantic tensions.

Her surname **Aiba** (相羽) combines "phase" (相) and "feather" (羽), while **Mui** (六) means "six," typically pronounced "Roku" but read as "Mui" in her case.