Based in Planeptune, IF represents Idea Factory as a Guild member. She forges lasting bonds with Neptune, Compa, and Nepgear early on. Initially pragmatic and headstrong, skeptical of unnecessary activities, she gradually opens up, displaying a more caring side, especially towards her close friends. This shift is clear in her mentorship of Nepgear, where protectiveness and occasional vulnerability about her own insecurities emerge. Her background as a seasoned traveler grants extensive knowledge of Gamindustri, though prolonged solitude fostered an initially self-centered outlook. Assigned to clear a dungeon in the first game, she encounters Neptune and Compa. Learning of their quest to gather Key Fragments to save Histoire and the world, she permanently joins them. Throughout this journey, she warms considerably, shifting from dismissive remarks about Neptune to expressing genuine concern for the group. She demonstrates a dry sense of humor and deep loyalty, insisting the party stay together during challenges. In *Hyperdimension Neptunia mk2*/*Re;Birth2*, she acts as a guide and support figure during the ASIC crisis. Her relationship with Nepgear deepens, revealing sensitivity beneath her typically sarcastic exterior. She expresses guilt over past failures to protect friends and strives to become stronger, highlighting her sense of responsibility. She possesses a notable aversion to being called "Iffy," which lessens over time. Her appearances extend beyond the main games. The manga *Hyperdimension Neptunia: Megami Tsuushin* shows her discovering Neptune suffering from Low Polygon Syndrome and working with Compa for a cure. She later reluctantly joins Neptune's idol group to support her, assisting during a concert mishap. Additional stories depict her participating in a test of courage with Neptune and Compa and attending a New Year's party with the goddesses, sharing Neptune's dislike of eggplants. A childhood flashback shows her meeting a younger Neptune, Plutia, and Peashy while delivering an important item. She features prominently in numerous spin-offs: main protagonist in *Superdimension Neptune VS Sega Hard Girls*, treasure set manager in *MegaTagmension Blanc + Neptune VS Zombies*, and beta tester (Adventurer class) in *Cyberdimension Neptunia: 4 Goddesses Online*. She also makes cameos, hosts events, or serves as support in titles like *Hyperdimension Neptunia: Producing Perfection*, *Hyperdimension Neptunia U: Action Unleashed*, *NepNep☆Connect: Chaos Chanpuru*, *Neptunia Shooter*, and *Neptunia x SENRAN KAGURA: Ninja Wars* (as a shrine maiden). She appears indirectly via customer requests in *Neptunia Game Maker R:Evolution*. Physically, she has fair skin, emerald eyes, and light brown waist-length hair often styled in a ponytail secured by a leafy green accessory. She stands approximately 150 cm (4'11") tall. Her signature outfit is a black tank top and shorts combination under an open dark blue oversized jacket, complemented by matching boots. She carries nine distinct cell phones, primarily using the IF Mate Rose Pink model. She demonstrates notable strength by effortlessly lifting Segami's 16-ton hammer with one hand. Her personality blends seriousness with sarcasm, exhibiting strong loyalty and occasional tsundere tendencies regarding friendships. Her dungeon exploration ability is "Treasure Search," revealing hidden chests. Outside the core series, she appears in collaboration events for *Million Arthur* and *Phantasy Star Online 2* (where her *Superdimension Neptune VS Sega Hard Girls* costume was available). She was also a playable character or costume option in the Japanese release of *Mugen Souls Z* via promotional DLC, later released internationally in the PC version.