Scarlet Commander Marjhan serves as an ambassador of the Scarlet Crusade at Light's Hope Chapel in the Eastern Plaguelands. Currently, she is engaged in a meeting with the Argent Dawn and Brotherhood of the Light, deciding how to counter the ever growing threat of the Undead Scourge.
She seems to despise the Horde (standard Scarlet Crusader reaction), judging by her calling them "Heathens...the revolting, unkempt Horde filth," and believes that finding the Ashbringer is the only hope for victory over the Scourge. She is not present during the Battle for Light's Hope Chapel.
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Marjhan has been turned undead and now serves the Risen.
"The Argent Dawn might be impotent idealists, but their delusional leader knows that they are outmatched. I have been sent here as an emissary of the Scarlet Crusade. An ambassador, if you will... It is doubtful that we could even dent the armies of Kel'Thuzad - united or not - but we might be able to contain them long enough for some sort of miracle to happen.
As for me? I'll die in battle...