I'd say some more of Mikoto Misaka from the Toaru Kagaku no Railgun series, she's like my favourite tsundere out there and not only that but she lives in a super interesting world too ^^
Sully (Fire Emblem Awakening), R34-chan (like literally anything), Dark Cloud (any female character honestly, there's a lot to cute ones to pick from, hell, one of the bosses is an evil ice queen with large breasts), Tenenbaum (Bioshock) and Cynthia (One Off).