Oona was believed to be a vegetarian, but it was proven false in the episode "The Legend of Pinkfoot!". During Lunch she was having a turkey sandwich and in "The Lonely Rhino!", she had a cheeseburger.
Oona's favorite color is pink, especially bright pink. Although, in "The Crayon Prix", she had to drive a canary yellow car.
Oona is the only female guppy to wear a full tail, instead a half tail and bikini top
Her best friend is Nonny, whom she is often seen with, when not with Deema. Deema is also one of Oona's very close friends. Deema often uses affectionate pet names for her on occasion also.
Despite being in almost every Lunch segment,Oona rarely does the lunch jokes main punchline. The only episode which she did this was "Super Shrimptennial Celebration" (a horn on a cob).
In "We Totally Rock!", it is revealed that Oona's favorite food is cream cheese and jelly sandwiches.
Oona is the guppy to ask the most questions in almost every episode and Nonny usually answers her question.
On November 10, 2011. Bubble Guppies's Facebook asked the fans to answer "Which guppy is your kid most like?", and Oona is in third place with 63 votes.
On January 24, 2012, Bubble Guppies' Facebook page asked the fans to answer "Which Bubble Guppies character would you name your kid after?", and Oona is in fifth place with 18 votes.