I recently just finished this manga. As I do not start typing threads about "normal" topics, I thought that it was only proper that I continue the trend. Hooray for more anime topics!
Keitaro Urashima: LII? What is most clear is that his leading function appears to be an introverted IE. So he is either LII, IEI, ILI, or EII. I would say that his own positive responses to Fe, probably indicates that he is LII. He is neither comfortable with Se nor does he seem to value it.
Naru Narusegewa: ESE. She has mercurial moods shaped by her surrounding environment. She has strong Se, but it is not valued. More often than not, she tends to act as a hen mother and caretaker to the other tenants of the dormitory.
Mutsumi Otohime: SEI (maybe EII). Shares many values with Keitaro, and frequently is shown to have a similar personality. She gets along real well with both Naru and Keitaro. But she is a bit ditsy, though she is quite well attuned with people's feelings. She often sacrifices the well-being of her own feelings for the sake of others.
Shinobu Maehara: SEI. Quiet, shy, and soft-spoken.
Motoko Aoyama: LSI?
Kaolla Su: ILE. A conventional mad-scientist ILE archetype. She is somewhat crazy, but does not realize or seem to care about how uncomfortable she makes people with her presence.
Mitsune Konno: EIE. She tends to be manipulative with her emotions and feelings towards ends. She frequently plays the part of the seductive trickster who attempts to use her sex appeal to obtain favors or get others to admit their feelings.
Haruka Urashima: IEI?
Noriyasu Seta: ILE.