Bonnie

Bonnie  (Eureka in Japanese) is the little sister of Clemont and one of Ash's major traveling companions in Kalos during Pokemon XY.

Appearance
Bonnie is a small and slender young girl with shiny golden-blonde hair tied in a side ponytail with an orange band and sky blue eyes. She wears a brown short-sleeved top with a soft black bow on the neckline, knee length black leggings covered by a puffy white skirt resembling a cloud, Barbie pink coloured Mary-Jane shoes on her feet and a yellow shoulder bag.

Personality
She has a great love for Pokémon. Despite her not being old enough to train Pokémon, she has strong ambitions and goals of being a trainer. She tends to forget she is the younger sibling and becomes very protective of her older brother Clemont. As a result, she'll often look for a beautiful girl to be her brother's wife, much to his chagrin. She is sometimes annoyed with his over-protectiveness and nagging, but she understands that he loves her very much, and she returns these affections. When frightened or stressed, Bonnie will reach for her brother's hand, or hide behind him, thus displaying a keen element of trust in their relationship.

Besides Clemont, Bonnie also has a sisterly relationship with Serena, likely because of the fact that they are the only girls in the group and thus share similar interests. This is corroborated in Day Three Blockbusters! where she assisted Serena in the kitchen making Poké Puffs. In turn, Serena often does little fashion-related favors for Bonnie, acting in the role of the cooler older sister.

Bonnie enjoys caring for Pokémon, and is very protective of those under her care. She is curious and enthusiastic when encountering new Pokémon as well.