I couldn't identify the DF and it's exactly so I updated that part later.
Still not sure about Wolff's son's name though. It's Bagha or Bakka something
- Wolf’s son, Bakka, is the user of Dero Dero fruit, which has the ability to dissolve anything. He can turn himself into liquid, and he can shoot beam that can “dissolve people’s heart”(to control them) from his eyes. If the people who got hit by the beam were not released from its effect within 24 hours, they will die, “their heart will be completely dissolved”. They either need to kill the user or make him pass out other than when he’s sleeping.