Flower

Animate Flowers are residents within the Lotus Forest of Wonderland and are first introduced in Kingdom Hearts. They are giant, talking plants that come in several colors and interact with the protagonists in various ways.

Kingdom Hearts
Red and yellow flowers ask Sora to give them items, while pink flowers request Thunder magic to be cast on them. Most flowers reward Sora with prizes and items, but one enlarges him, similar to the effect of drinking the potion in the Bizarre Room. This enlargement spell is undone by eating the Seed from the nearby tree. All red and yellow flowers, except the one that can enlarge people, exchange items once, after which they merely chat with Sora.

After Alice goes missing at her trial, a cutscene depicts a flower opening its petals and then shooting a boulder out onto the ground nearby, upon which the Cheshire Cat appears.

Kingdom Hearts Chain of Memories
Red, yellow, and pink flowers reappear within the version of Wonderland crafted by Sora's memories, and can be attacked to cause them to drop HP or Moogle Point prizes.

In Re:Chain of Memories, a non-talking purple variety appears as an obstacle in some rooms, barring doors with thorny roots, and must be destroyed in order to progress. There are also thorny, yellow flowers, which shoot pellets that poison Sora and Riku.

Kingdom Hearts 358/2 Days
Red, yellow and blue flowers are a background presence in Lotus Forest. In Mission 51, Pink Concertos hide within the flowers' closed buds, prompting Roxas to examine the flowers to expose the Heartless.

Personality
Not much is known about the flowers as they play a small role in the game. However, it is known that they are often grateful to those who satisfy them. The flowers are all part of the same community and they make friendships between each other. They are shown to have a certain level of thinking and intelligence as they frequently make remarks and observations about the world around them. Also, they are extremely mysterious, for example, one flower has a strange "power" to enlarge people.

Origin
The flowers first appear in Disney's 1951 animated feature,. As in Kingdom Hearts, they have the ability to talk and are insignificant to the film's overall plot.