This... THIS SHOULD HAVE BEEN CANON!

Indeed, my friend, indeed. Alas, poor Reinforce, she was a good book.

... Well technically it is kind of canon. After all, Reinforce fused a part of herself with Hayate's linkercore and then Hayate gave 'birth'/created Reinforce Zwei from that fusion...

Oh wait, you meant both Reinfroce and Zwei together alive...