Originally belonging to a Princess named Salvia, Togekiss was given to Dawn after she let Princess Salvia take her place in a Pokémon contest. Togekiss has many powerful attacks, like Aura Sphere, that allow it to be able to hold its own in battle and create amazing appeals.
Personality wise, Togekiss may be carefree and happy, but it can be strict and tough at times, like when Ash's Gible used Draco Meteor and nearly hit Dawn's Piplup, Togekiss knocked it back to Gible and gave it a stern talking-to, telling it never to do it again. Dawn compliments on it's personality as being the big sister of her Pokémon roster. Togekiss is like the mother Pokémon to Dawn's team and is always looking out for them. It helped Piplup from one of Gible's out of control Draco Meteors and it let Piplup express its feelings about leaving the gang.