Or Stephen Amell (Oliver). Just imagine that Ghost monologue at the start of TTK. "My name is Ghost, and for Centuries, I have been looking. I was born from the Travellers last dying breath to search for a Guardian to forge his/her legend and to protect the Light. But to do so, I must become someone else (ha get it cause they changed the voice actor. lel), I must become, something else." The Ghost is green, has the GA symbol as its eye display, and a little green hood.