Like every Alliance champion, she is only encountered by Horde players.
Evensong is a hunter and uses Shoot, Multi-Shot and an (interruptable) ability called Lightning Arrows, which looks like a druid's Hurricane. She is mostly annoying in that she can use Disengage to get out of melee range of your tank.
Patches and hotfixesEdit
Patch 3.2.0 (04-Aug-2009): Added