Melina Whistler, daughter of composer Oswald Whistler and confidante of opera singer Janice Quatlane, succumbed to illness at 22, igniting her father’s obsession with reviving her through the Detragan—a machine designed to transfer consciousness into living hosts. Unbeknownst to Oswald, Janice became the first successful vessel, suppressing her own psyche to harbor Melina’s identity. As Oswald continued abductions, including young Nina, Melina’s consciousness within Janice covertly intervened, enlisting Professor Layton to unravel the Crown Petone opera house’s deadly puzzles and halt her father’s experiments.

Guided by her refusal to usurp others’ lives, Melina opposed both Oswald and Jean Descole, who sought her knowledge of Ambrosia’s resurrection. She alone possessed the "Song of the Sea," a melody central to raising the lost city, tied to prophecies naming her the reincarnated queen destined to restore Ambrosia. During the final confrontation, she aided Layton in uncovering the "Song of the Sun," completing the ritual before relinquishing control of Janice’s body, prioritizing ethical mortality over stolen existence.

Post-Ambrosia’s rise, Janice reclaimed autonomy while Oswald, arrested but granted a final Detragan performance, mourned Melina’s legacy. Her physical traits—a dark turquoise geometric-patterned dress, light pink hair bands securing twin ponytails, purple undergarments, and soft boots—mirrored her duality as both a spectral influence and a figure tethered to myth. The Greek-derived "Melina" ("song") echoed her role in Ambrosia’s resurrection, her arc concluding with themes of sacrifice, acceptance, and the unresolved ambiguity of her connection to the ancient queen—a testament to legacy shaped by memory rather than immortality.