Selphie

Selphie is a minor character in the Kingdom Hearts series, and one of the characters originally from the Final Fantasy franchise. She was one of Sora, Kairi, and Riku's friends on Destiny Islands along with Wakka and Tidus, and later attends school with Kairi at Twilight Town in Kingdom Hearts II. She is thirteen years old at the beginning of Kingdom Hearts and Kingdom Hearts: Chain of Memories.

Kingdom Hearts
Selphie is a resident of the Destiny Islands and a friend of Sora, Kairi and Riku. She spends most of her time with Tidus and Wakka. She is one of three to ask Sora a question that helps determine his leveling pace during his Dive into the Heart in the Destiny Islands area, asking: "What is most important to you?". This can be answered with either A) being number one, B) friendship, or C) my prize possessions.

Like Tidus and Wakka (also from the Final Fantasy games), you can challenge her for exp. She uses a jump rope (a would-be toy counterpart of her original incarnation's weapon, a nunchaku) to attack, and is probably the fastest out of the three. However, her attacks are easy to block and counter, which means more exp. However, her speed may annoy impatient players, as she sometimes dodges attacks easily.

When the Heartless destroyed Destiny Islands, her whereabouts were unknown. The most possible answer to this is that she disappeared along when the islands were destroyed. But thanks to Sora she was able to return along with Destiny Islands. She is last seen playing with Wakka and Tidus after the island was restored in the end credits.

Kingdom Hearts: Chain of Memories
A memory-based version of Selphie appears within Castle Oblivion in Kingdom Hearts: Chain of Memories. Sora briefly speaks to her along with Tidus and Wakka when he goes to Destiny Islands. When Riku goes there she also appears with Tidus and Wakka, but quickly disappears.

In the ending credits of Kingdom Hearts Re:Chain of Memories, the real Selphie is shown playing on the beach with Tidus and Wakka while Kairi looks at the Small Island.

Kingdom Hearts II
Selphie is the only other islander apart from Sora, Riku and Kairi to appear in Kingdom Hearts II. Like the other characters, she is shown to have forgotten Sora as a result of Naminé's manipulations. She is a schoolmate of Kairi's as she is seen wearing the assumed school uniform.

She offers for Kairi to go to the kids' island after school one day and Kairi reveals that she promised herself not to go to the island until she remembers the boy's (Sora's) name. And although Selphie has no memory of Sora, she does believe Kairi's story of his existence. This also hints that Kairi has romantic feelings for Sora, because she can't bring herself to "betray" Sora by going to the island when she can't even remember his name.

Kingdom Hearts coded
A data version of Selphie appears in Kingdom Hearts coded, alongside Wakka and Tidus, all of them made of data. She asks the Data Sora to destroy the block and gives him a Hi-Potion for doing so.

Role in the series
Though Selphie has no fighting talent, Kairi visits her in Twilight Town on many occasions because of Kairi now being home-schooled by Lord Shen. Selphie herself also visits the Dragon Temple every now and again. She even attends Sora and Kairi's wedding in Radiant Garden.