Rain Flames are mostly blue with shimmering particles that seem to "flow" though them, giving them an appearance similar to rippling water. The core is cerulean blue and the outer sections are a lighter tone of blue.
Its Tranquility characteristic allows it to weaken anything it touches. It can be used to slow down the opponent's movements or attacks. One proficient in the usage of the Rain Flame can use its Tranquility characteristic to such a degree that anything entering a certain barrier will be completely immobilized, effectively breaking a machine or killing a human.
Rain Flames are also able to be frozen just like Sky Flames.