A part-timer at a private investigator's office in the back alleys of Lefundos.

In the past, she lost her parents after becoming entangled in the affairs of the underworld and eventually came under Robin's care.

Watching Robin single-handedly take down enemies to protect her, she came to understand that true strength is needed to protect others. Inspired by Robin, she began to admire the idea of becoming a feared villain who ruled the back alleys...but the Robin she looked up to had since left her underworld past behind and settled into life as a local deadbeat.

Leaving Robin behind, Rinak, known for her agility, has earned a reputation as the "Phantom Wind." Unaware that Robin is still secretly watching her back, she boasts that no one can catch her.

One day, while exchanging banter as always, Rinak's fate changes when she is chosen to become an Heir by the Guardian Hanien.