Thanks to the wonders of localizations, we have two characters named Wren. Both are technical specialists and great at repairing broken machines. Both have lots of add-ons they can install. PSIII Wren's add-ons are all vehicles that somehow carry four people when they're only big enough for one, while PSIV Wren's add-ons are weapons of mass destruction.
Which Wren do you like the most?