Additional info from Wikipedia:
Takane is a member of 'Project Fairy', and appears in the PSP games as a rival. Takane has long, white, and wavy hair, and fringe cut bangs, and is usually seen in elegant outfits, and accessorizes with hairbands. She has a snobby, stuck up attitude due to her wealthy upbringing, and her mother is deceased, and she lives with her Butler, who is very strict, because her father is on business quite frequently, and owns a large company, like Iori's father --- which causes tension to spark between the two. She has an amazing passion for music, and is a typical tsundere archetype. Her personal song is 'KisS'. She is considered one of the smarter characters in the series, and is fluent in numerous languages, one of which being German.
It was hinted before that Takane is probably an alien. I say "How dare you, Kuroi! To bind her to you by threatening to reveal her true identity!"