OVA
Description
HMX-17a Ilfa is an experimental humanoid maid robot developed by Kurusugawa Electronics. She operates on the specialized "Dynamic Intelligence Architecture" software designed by teenage technological prodigy Sango. Ilfa belongs to the HMX-series robot line, with designated sister models HMX-17b Milfa and HMX-17c Silfa.

Physically, Ilfa possesses blue hair styled with blunt bangs, worn shoulder-length and straight, complemented by violet tareme-shaped eyes. Her slim body frame stands 153 cm tall with measurements of 85-56-82 cm (bust-waist-hips). She typically wears a maid uniform featuring a miniskirt, thigh-high stockings, puffy sleeves, a string ribbon tie, and Mary Jane shoes.

Characterized as obedient and using "watashi" as her first-person pronoun, Ilfa primarily serves as a maid, performing household tasks like cooking. Her responsibilities include supervising and disciplining her sister unit, HMX-17c Silfa, due to Silfa's emotional instability, shyness, and subpar housekeeping performance. Ilfa frequently intervenes to correct Silfa when she retreats into cardboard boxes during social interactions.

Ilfa appears across multiple *To Heart 2* franchise installments. She is a side character in the original visual novel *To Heart 2*. Her role expands in the spin-off *To Heart 2 AnotherDays*, where she remains a supporting figure but gains additional narrative presence through interactions with Silfa and others. She also features in the Eastern RPG spin-off *To Heart 2: Dungeon Travellers*, which reimagines the characters in a fantasy setting.

Background lore notes an early connection: Ilfa's operating system was referenced in the anime *To Heart: Remember My Memories*, where Sango provided it to another character three days before the *To Heart 2* visual novel's official release, establishing her conceptual existence prior to her formal debut.

Merchandise reflecting her design includes 1/8 scale figures released by Kotobukiya in 2006.