Waltraute
She-Devil
I found it! Here's the non plus ultra in the imaginary manc mate stakes, from RAWK --Aah yes....the imaginary rag mates. Yeah, coz that's what we do innit? I'll just ring my City mate and talk to him about money ruining football. You know, just out of the blue like. The sad pricks on there believe em as well. Did you see the Scouse one that lost an argument with his imaginary United friend? It is brilliant.
https://www.redcafe.net/threads/rawk-goes-into-meltdown-2011-2012.333736/page-119#post-11098040
As Badunk said - 'Imagine being beaten in an argument by someone you invented'