The most prominent example in terms of war cries etc. must be Henry Newman, who spent a large part of their roleplay series stuck in a medieval fantasy world, involuntarily leading a civil war (which he grew to sympathize with). His war-cry was "FOR (THE) RED PAWN!" which was also the motto of the faction.
Other mottos include "For the greater good" (in England, particularily when dealing with espionage and Occultist matters) and "I am always myself (even when I'm not)" (as a reply to people telling hir that s/he can't keep "trying to be someone s/he isnt'").