Rena makes her first appearance in episode 3 as a lost little girl
that Kazuya and May find. Unknown to them, she was actually sent
by Cyberdyne to recover May, whom was never paid for.
Rena possessess the ability to make things happen with her shrill annoying
cry. Similar to May, she can also control traffic lights, and simple electronics.
Rena decides that she likes Kazuya and Ikariya too much, and doesn't want to return to Cyberdyne. She moves in with Kasumi, because its looks to weird to have Kazuya living with a little girl.