So base question is if Sima Yi is available for anyone or is he a character that only appears in Cao Cao's campaign? I ask because for the longest time I thought Zhuge Liang was only available through Liu Bei's campaign, until I bumped into him by accident near Jing, so I figure I'd ask if Sima Yi is like that too. Also is there any possibility of getting a map with locations of unaligned generals or is that not possible?

Thank You in advance