She is extremely unlikeable in multiple episodes such as The Limit, The Fridge, The Meddler, and The Hero.Her monster design is very terrifying and scary for younger viewers.She can be a huge psychopath because in the episode called The Limit, she is trying to get her hands on her own family.Although being a great mother, she was shown as a extremely short tempered.She does have some funny moments like when she get's angry as demonstrated in some episodes like in The Pizza, The DVD, The Parking, The Helmet, etc.As mentioned before, she does not like to lose, but still does not prefer to fight those who had a close relationship with her, such as Yuki, unless they threaten her family or her job.Surprisingly enough, she has won before, yet she can still accept her defeat, understand her mistakes, or find humor in them.She proved herself to be very resourceful and inventive (a trait she most likely passed on to her daughter Anais who has demonstrated similar talents) like when she set up a mine-like trap in a paintball arena/forest.
Nicole is very athletic, and is fully capable of chasing her children across the neighborhood when they are in trouble, as shown in "The DVD." Even Gumball compared her to a ninja.Gumball, Darwin, Anais, and Nicole, defeating the giant monster through the power of teamwork. Despite being a normal woman cat, she was strong and tough because she was shown to be a great combat fighter. Richard, the dumb parent, purposefully tripping Gumball with a die, taunted him in D&D speak, and even managing to reunite the family in his own weird way through a classic D&D game session.Like when her children were late to school, she ran faster than the speed of sound to make it in time. She is a very responsible person, and one of the few serious characters on the show.