Akira Mitsurugi is a 21-year-old male idol in the unit F∞F, standing 183 cm tall, weighing 68 kg, with blood type A and a birthday on August 31st. His naturally dark skin, wavy dark brown hair extending past his nape, and narrow golden eyes frequently lead others to mistakenly assume he is half-Japanese.

Previously a model, he felt apathetic toward that career and people in general. He shifted to idol work to "aim higher" and embrace new challenges. As F∞F’s oldest member and caretaker, he maintains a calm, composed, and level-headed demeanor, consistently appearing gentle and smiling—though he turns intimidating when angered. He displays protectiveness toward Seiya due to the latter’s bold behavior and holds a strong attachment to Kanata, often permitting him to sit on his lap and viewing him as a "cute younger brother."

His interests include yoga, where his flexibility excels, and reading. He favors coffee as his preferred food but dislikes almond jelly. A notable weakness is his exceptionally poor drawing ability, which he acknowledges.

His character evolved from initial emotional detachment during modeling. After joining F∞F, he grew into a more serious and caring individual, actively supporting and guiding unit members while embracing his self-identified role as their guardian.