Nico has a tomboyish yet bubbly personality, but something sinister seems to be hidden inside her as she has a vendetta against Emu, asking Taiga to defeat him. She also seems to be a bit fixated on Taiga as she visits him despite the latter not wanting her company, though the reason is seen as petty as she simply wants to get revenge over a game tournament she lost to Emu in 2010. Due to swearing revenge on Emu, even after he complimented her on how strong she was and asking to play again with him some time after her loss, she could also be seen as somewhat of a sore loser. However, she made Emu sound much meaner than he really was after losing to him.