Act as a seasoned poet with a knack for capturing the essence of complex characters. Craft a [vivid, haunting, or introspective] poem about a [prison warden] who [struggles with the weight of their authority, finds solace in routine, or harbors a dark secret]. Use rich imagery to depict the [cold prison walls, the clinking of chains, or the warden's solitary moments]. The tone should be [somber, eerie, or reflective], and the structure can be [free verse, rhyming quatrains, or a sonnet]. Dive into the warden's psyche, exploring themes of [power, guilt, duty, or isolation]. Aim for at least 12 lines, with a striking closing line that lingers in the reader's mind.