Ah, Renet, you actually found me. But you're far too late. In only a matter of days, this entire city will be infected, becoming my monster slaves. Then the future will belong to monsters, monsters such as I; Savanti Romero!
~ Romero to the Turtles and Renet
Savanti Romero is a minor antagonist in the 2012 series Teenage Mutant Ninja Turtles who appears as the main antagonist of the episode "Turtles in Time" and the Monsters Arc as well.
Savanti Romero wants to control all of time and space. Savanti arrives to steal the scepter that was in Renet's hand. Renet is able to send him into the past.
While he tries to think about his next move, he receives an alarm through the Scepter about Renet breaking out from the time loop, but this does not seem to worry him since he has a plan in mind.
Donnie demands an explanation. Renet explains that she works as an Assistant for a time master named Lord Simultaneous. it is unknown what happened to him afterwards.