I should consider possible sources. The torment chair might be a torture device or a specific location within a narrative. Graia's role here is tormenting Lena. I should look into existing lore or recent media to see if "Graia" is used in a way that fits this context. For example, in the game "SOMA," there's a character named Amata, but that might not fit. Maybe "Graia" is part of a less-known game or a fan-made story.