A few suggestions:
Kohta: IEI, probably
Yuka: EIE maybe?
Bando: SLE
Lucy: LSI, perhaps
Nyu: SEE
Nana: Fe ego, probably
Professor Kakuzawa: ILE
A few suggestions:
Kohta: IEI, probably
Yuka: EIE maybe?
Bando: SLE
Lucy: LSI, perhaps
Nyu: SEE
Nana: Fe ego, probably
Professor Kakuzawa: ILE