Lin Grace, a British heiress and Eiken Club member at Zashono Academy, sports blonde looped pigtails fastened with red face-detailed beads and closed green eyes. Her signature outfit is an extremely short red Chinese cheongsam with gold lining and pink roses, frequently exposing white panties, paired with gold bracelets, black knee-high socks, red shoes, and a yellow thigh band. She stands 170 cm (5'7") tall, weighing 44 kg (99 lbs), with measurements of 77 cm (30A) bust, 55 cm (21") waist, and 80 cm (31") hips.

Daughter of a major corporation's CEO, she inherits vast wealth enabling daily private jet commutes and residence in an old European-style castle on campus. Lin passionately practices fortune-telling, often attempting intimate readings for Densuke Mifune by embracing him from behind. Despite her fragile appearance, she wields extraordinary martial arts skill—shattering test-your-strength machines with one palm strike and single-handedly subduing kidnappers. Her strength remains hidden by weighted jewelry, with bodyguard Leon primarily shielding attackers from her retaliation. Paradoxically, she fears ghosts.

Romantically drawn to Densuke, Lin peppers their conversations with heart symbols yet intermittently ignores him. She is perpetually shadowed by Kuma, a timid classmate clad in a bear costume.