He's the Greek god of grapes, wine, wine-making, theatre, fertility, ritual madness and religious esctasy. In essence, a character who would likely engage in all forms of festivities involving debauchery. Fits my headcanon for evil Alicorn Queen (De)Cadence's character, who I imagine to be someone like Slaanesh in pony form ( warhammer40k.wikia.com/wiki/Sl… ).