Miku Munakata operates as Happy Seven within the Better Fortune Research Organization, embodying the Lucky God Hoteisama. She serves as the team's medical professional, readily identifiable by her signature labcoat—sometimes revealing her midriff—and arm bands. Her duties involve providing medical care and expertise during the group's missions combating supernatural threats.

Her transformation unlocks the power to predict future events, granting crucial strategic foresight against adversaries like the Magatsugami. These abilities align thematically with the Seven Lucky Gods' focus on fortune and foresight.

Physically, Miku possesses long brown hair extending to hip length and brown eyes. She maintains a mature presence consistent with her medical role within the team dynamic.

The character appears consistently across official manga adaptations including *Gakuen Happy Seven*, *Ganso Happy Seven*, *Shin Happy Seven*, and *Happy Seven: Final Season*. Her established role and core attributes remain unchanged throughout these appearances. Her narrative function centers on collaborative efforts as Hoteisama within the Happy Seven framework against adversaries. Her pre-organization life, family background, personal history outside the team, and character evolution across media remain undocumented.