サイバドール・レナ, Cyberdoll Rena
At first Rena Cf3357LJPA appears to be a lost 9yearold girl discovered by Kazuya and May. However she is another cyberdoll sent by Cyberdyne to recover May. Rena decides that she likes Kazuya and Ikariya and does not return with May to Cyberdyne instead she moves in with Kasumi. In the Japanese audio she is referred to by everyone including herself exclusively as Renachan. Source: Wikipedia