Prior to the start of the manga, Rara was given to Ruby as a Ralts as a gift from his father, Norman. One day when Ruby was playing with Sapphire a Salamence attacked them and Ruby sent out Rara, Nana, and Kiki to fend it off. The three managed to scare it away, but Ruby got injured in the process, which scared Sapphire. Because of this incident Ruby decided to never battle in front of people again. Before moving to Hoenn, Rara was used by Ruby to win multiple contests in Johto.
In Tongue-Tied Kecleon, Rara is loaned to Wally to help him capture his first Pokémon. Rara was sent out against a Kecleon and attacked with Confusion. Due to her relentless attacks Kecleon tired himself out and was captured by Wally. Immediately after the capture an earthquake strikes and tears the ground apart, throwing Ruby into the sea. With no way to get out Ruby tells Rara to stay with Wally and watch over him.
After a long absence, Rara returns in Talk About Timing, Treecko, still under Wally's care. It is revealed that the two traveled to Pacifidlog Town so Wally could have a better place to recover from his illness. While there they are swept up by the storm caused by Kyogre and Rara soon senses a Treecko floating in the water. After saving him Norman shows up and shares a happy reunion with Rara. The three of them then head to the Sky Pillar for Wally's training. Rara is used alongside Wally's other Pokémon to help him advance through the fifty floors.
In Cunning Kirlia, Rara is used in Ruby's fight at the Battle Dome against Emerald and his Dusclops. The battle starts with Rara using Hypnosis to put Dusclops to sleep. He breaks free of the attack and attacks with a barrage of Shadow Balls. Surprised that Rara is still standing, Emerald has Dusclops use Fire Punch, which gives Rara a burn. Although Emerald thought that would help him win, Rara's AbilitySynchronize activates, giving Dusclops the burn as well. On top of Rara using Imprison to keep Dusclops from using Shadow Ball, both Pokémon faint from the burn, resulting in a tie.
In Omega Alpha Adventure 0, Sapphire borrowed Rara to train her alongside her own Kirlia, Kirly, with the intent on evolving them into a Gardevoir battle duo. When the two began evolving, Sapphire accidentally unearthed a Dawn Stone and kicked it towards Kirly. The stone caused Kirly to evolve into a Gallade while Rara evolved into Gardevoir. In Omega Alpha Adventure 9, Rara was reunited with Ruby, who was impressed by her new form.
Rara is intelligent and calm. Much like Ruby, she is flashy, loves to show off her looks, and hates getting dirty. Rara is very close to Ruby, which is demonstrated by her ability to sense his emotions even when he is far away. Despite Ruby's distaste towards battling, Rara is a very powerful battler.