Lorien guide is highly over costed. Three cost for one willpower and one progress is not a good deal. With O Loriens's discount, however, he (she?) becomes completely playable. He's a Silvan, so he also comes with all shenanaginry of that trait. Sadly, that still doesn't give enough purchase to play them. There are just to many other better location control allies.
Ally. Cost: 3. 1 1 0 2
Response: After Lórien Guide commits to a quest, place 1 progress token on the active location.
"Indeed deep in the wood they dwell..." Aragorn, The Fellowship of the Ring
Core Set #44. Spirit.