Penny Fitzgerald/Relationships

Gumball
Gumball and Penny are deeply in love with each other, but Penny seems to have an easier time hiding her emotion (in other words, smoother) when Gumball is around. Unfortunately, neither is capable of expressing it, even though they are both aware of the other's affection. So far, Penny has kissed Gumball on the cheek twice ; in addition, they attempted to kiss on the lips twice - once in "The Pressure", and another in "The Party". Both attempts failed as in the former, Banana Joe chopped down the treehouse that the kiss was taking place in, and in the resulting confusion, Gumball kisses Darwin on the lips in "The Pressure". In the latter, the moment was ruined by Richard honking his car horn loudly and interrupted the moment, so Gumball instead said to Penny that he loves her in "The Party", causing her to blush.

Mr. Fitzgerald
In "The Date", it is revealed that Penny's father is very protective of his daughter and at first does not approve of her hanging out with Gumball. In the season two episode "The Knights", it is shown that he still does not care for Gumball, though he began accepting him at the end of the episode because of how he saved his daughter's life.

Tobias
In the episode "The Knights", Tobias is shown to have a crush on Penny. The feeling doesn't appear to be mutual, because she only has feelings for Gumball.

Leslie
In the episode "The Flower", the two begin to meet, making Gumball jealous. Leslie is Penny's cousin.