There is no official patron saint of rebellious individuals but, unoffically, you might look at St. Francis of Assisi and St. Augustine. They were both quite rebellious in their younger years. For girls St. Therese of Lisieux was noted as being a bit rebellious and spoiled as a child who was known for her temper tantrums.
As far as I can determine, there is no special patron saint of cheerleaders. However, there are a number of other female saints who could help you: St. Lucy, St. Agnes, St. Philomena, St. Maria Goretti, for example. Even St. Teresa of Avila would be a good choice. During her teenage years she was quite rebellious and preferred boys, fine clothes and socializing to a religious life.
There is no patron saint specifically for serial killers. Saints are typically recognized for their holiness and virtue, so it is unlikely that a saint would be designated for individuals who commit heinous crimes.
The Patron Saint Inex lists no patron saints of bears.
A patron saint is supposed to be a protector in the Catholic religion. Patron Saint Angelico is the patron saint of artists. A patron saint is a protector of life.
As per the Patron Saint Index, there is no patron saint of wrestlers. However, Saint Sebastian is the patron saint of all athletics and athletes.
Saint Lillian is not a patron saint as per the Patron Saint Index.
There is a patron saint of Wales but no patron saint of whales.
There is no patron saint of color.
There is no patron saint of voting.
There is no patron saint of red heads as per the Patron Saint Index.
As per the Patron Saint Index, Saint Cedd is not a patron saint at this time.
Saint David is not a patron saint of England. He is the patron saint of Wales.