Misty

http://i218.photobucket.com/albums/cc258/delilah_girl/Pokemon/z105413770.jpg  Misty is the Cerulean City Gym Leader and is one of the Pokemon TV series main characters. She travels with our hero, Ash Ketchum in almost every Pokemon Episode up to date, except in the newest ones in which she has been replaced with May or some other girl. Misty constantly watches over Ash and Brock, her companions, because they have a tendency to get into trouble. 

Misty is commonly seen with Pokemon such as Togepi, Goldeen, and Horsea, seeing as she is a Water-Type Gym Leader.