Hanaka Masaka is a freelance journalist arriving at the Todoroki residence seeking an interview after witnessing Kizuna Todoroki's victory over the long-reigning champion at the World Martial Arts Tournament. Fascinated by the young martial artist's achievement, she wishes to learn more beyond the sensational story. She has auburn hair, violet eyes, and is often depicted wearing glasses.

Her initial professional motivation shifts to genuine personal interest during interactions with the family. Kintarou Todoroki, Kizuna's grandfather, invites her inside upon seeing her at the door. Hanaka pitches in with household chores, demonstrating domestic skills and helpfulness, gradually integrating into the family's daily routines. She finds the warm atmosphere appealing, adapts to their casual rhythms, and becomes so comfortable she is reluctant to leave.

A crisis emerges when numerous martial artists arrive to challenge Kizuna after learning she was underage during her tournament victory. Hanaka stays alongside the family throughout these confrontations, observing their dynamics under pressure. Her continued presence during this period deepens her bond with the household, solidifying her role as an observer increasingly intertwined with their circumstances.

Her background prior to the tournament and activities beyond the events of the single film are not documented. Her character development occurs entirely within this timeframe, progressing from an outside journalist to someone emotionally invested in the family's wellbeing. Her narrative remains confined to this storyline without extension into other media, seasons, or spin-offs.