The OP song is called Truth by Bleum of Youth. I'm working on the translation... heh heh...

Anyway, for those who are wondering who all those people are in the opening.... They're other robots. And no. They aren't in the show!!! I wish I knew why!! I hope there'll be a lot more Twin Signal OAVs that have some of these people in it.

At this point I can pick out who they all are. If you slow down the list flashing by in the OP, you'll notice a list of weird words. They're the names of the robots in chronological order. The girl Signal is running with is Elara (I know... different clothes).

In the OP of the first OAV, you'll notice a blue haired guy back to back with a black haired guy. This is the shot that Pulse slices. The blue haired boy is Karma, and the other guy was Retro-Pulse. But if you watch the OP for the next two, you'll notice that Karma's hair colour has changed to lemon-lime. Well, the lemon-lime is the real colour. Someone made a boo-boo. Also, Karma was sitting on the floor with a yound Masanobu, the Professor looking on from the background. Karma's hair colour is wrong in the first OAV, and fixed for the 2nd and 3rd.

A bit of Ending Song blues... it's not on the Soundtrack cd or the drama cd, while Truth is on both!!! Though on the drama cd, Truth is cut down by almost a minute.