I could just see this 'flip side' as it seems so gloriously unlikely.
Its also very true that no one really notices him. He gets on with his job and there isn't neally so much of a fuss as there is about Ogata or Kurata. He must be somewhere between the two in both age and Go level.

'Greasers would claim him as their own with pride'

I guess this double life went very smoothly until he was tempted to play Go against Tsubaki, then his level blew his cover... ^_^