Lemmy Miyauchi is a Japanese-American high school student and a supporting character in ToHeart: Remember My Memories. Her full name is Lemmy Christopher Helen Miyauchi. She was born on December 21, is sixteen years old, and has blonde hair usually tied in a ponytail, blue eyes, and a height of 174 centimeters, making her taller than the protagonist Hiroyuki Fujita. She is a member of the school’s archery club.

Raised in California, Lemmy returned to Japan to attend high school. This background gives her an imperfect command of Japanese; she speaks with a noticeable American accent and frequently mixes up idioms and sayings. Despite this, she is cleverer than she first appears and occasionally delivers unexpected wisdom amid her verbal mistakes.

Her personality is loud, boisterous, and outgoing, often coming across as over-the-top, yet she is fundamentally kind-hearted and quick to offer help to anyone in need. She possesses a love for hunting and demonstrates impressive archery accuracy against moving targets, though she is surprisingly poor at hitting stationary ones.

In the story of ToHeart: Remember My Memories, Lemmy becomes a central figure when she appears to have had her memories erased, particularly those involving her past with Hiroyuki. This amnesia creates a dilemma for Hiroyuki and inadvertently causes stress for his childhood friend Akari Kamigishi. Lemmy’s role deepens the romantic entanglements of the series, as she eventually confesses her feelings to Hiroyuki. The recovery of her lost memories becomes a key part of her personal arc, revealing a childhood connection between her and Hiroyuki that both had forgotten. Through this development, Lemmy transitions from a loud, cheerful club member to a character grappling with hidden emotions and a forgotten past.