Wicker Man (ウィッカーマン) is a demon appearing in the series.
The Wicker Man was a large wicker statue of a human used by the ancient Druids (priests of Celtic paganism) for human sacrifice by burning it in effigy, according to Julius Caesar in his Commentarii de Bello Gallico (Commentary on the Gallic War). In modern times the figure has been adopted for festivals as part of some neopagan-themed ceremonies, notably without the human sacrifice element.
Wicker Man can be found in the 4th and 5th stratums of Naraku. Flynn will need the Demolingual App in order to obtain a Wicker Man by scouting it. Wicker Man can teach Flynn the Zan skill through its Demon Whisper.
Shin Megami Tensei IV Apocalypse
"A giant man made of wicker used in human sacrifices by Druids of ancient Celtic descent. The sacrifice was held inside, then the wicker man would be set ablaze. Some tales describe passersby stumbling across the remains, wondering how they got burned. Other Druid methods of human sacrifice included drowning men in barrels of water, hanging men from trees and shooting men with arrows."
—Shin Megami Tensei IV Apocalypse compendium
Wicker Man can be found in Shibuya. It can teach the Makajam, Mazanma and Magaon skills through its Demon Whisper. Wicker Man benefits from learning ailment and Force skills.
Devil Summoner: Soul Hackers
"A giant man made of wicker used in human sacrifices by druids of ancient Celtic descent. The sacrifice was held inside, then the wicker man would be set ablaze. Some tales describe the passerby stumbling across the remains wonder how they got burned. Other druid methods of human sacrifice included drowning men in barrels of water, hanging men from tress and shooting men with arrows."
Its description makes a reference to the 2006 remake of The Wicker Man, starring Nicholas Cage. There is a scene where Cage's character discovers a burned doll and demands to know "how'd it get burned?" in an over-reactionary fashion, making the scene popular for parody and remixes.