Rowan North

Rowan North is an occultist, former hotel employee and the main antagonist of the 2016 Ghostbusters reboot film.

Role in Ghostbusters (2016 film)
Rowan North builds devices to summon ghosts to attempt to bring about the apocalypse. Rowan plants another device at a live music venue, but the Ghostbusters are called in and they capture the dangerous spirit in front of hundreds of people. Later, They realize that Rowan is planting his devices along ley lines which intersect at the Mercado Hotel in Times Square, a site with a history of paranormal activity, and discover Rowan building a portal to the ghost dimension in the hotel basement. Rowan electrocutes himself rather than be captured, and Holtzmann deactivates the portal. Gilbert discovers a copy of her and Yates' book among Rowan's possessions, in which he details his plan to become a ghost and command the undead. Rowan returns as a powerful spirit, first possessing Yates and then Kevin, and returns to the Mercado to open the portal, which spawns hundreds of ghosts and throws the city into darkness. The police and Homeland Security attempt to stop Rowan and are quickly subdued, but the Ghostbusters fight through the army of ghosts to reach the portal. Rowan takes the form of the Ghostbusters' logo, grows to enormous height and starts destroying the city. The team make a plan to use Ecto-1's nuclear reactor to cause a total protonic reversal, close the portal and return the ghosts to their own dimension. The plan succeeds, but Rowan drags Yates into the portal with him. Gilbert leaps into the portal and rescues Abby.