Echowave is a dark blue-gray she-cat with a white chest, underbelly and paws, a blueish tipped-tail and wave mark on her haunch with ice blue eyes.
- Echowave is a very hyper cat and is a great friend, but is not afraid to shred blood when needed. She likes to tease her friends often.
- Echowave is a loyal warrior of RiverClan. She seems to have a crush on the RiverClan leader, Lionstar.
- When Hailstorm tells her about her father's kits, Echowave is calm. Echowave then tells Lionstar in hope for help, but Lionstar already knew. When she and Lionstar are outside camp, they skate on the ice around the lake. After she falls twice, She admits she really likes Lionstar and the leader tells her the same.
- She and Lionstar are sunbathing while Hailstorm exclaims that the twolegs are having some sort of party. Echowave nods and Lionstar looks at her asking if they want to be mates. Delighted, Echowave says yes, purring.
- When Hailstorm is about to have her kits, Echowave is sleeping. When she wakes up, she goes to see her and helps name her kits. She names Reedkit, a tortoishell tom with a red tail. She sees the resemblance in the kit and asks if Redfrost Is the father and Hailstorm says yes.
- When Icestorm comes into camp with an apple, she shows no interest. She, Icestorm and Lionstar out to hunt and Echowave teases Icestorm by pushing her out on the ice.
- Lionstar - Living
- Echowave's real name long ago was 'Lightningice' and Echo would call her LIce. She changed it due to the fact that many people complained, because lice was a bad thing.