The Egos Fears
Going on what @monochromemedic said about Jack’s fears and @fear-is-nameless asking if Anti would use the egos fears against them.
Chase: easy one. Not seeing his kids ever again. Anti using him as a puppet with the threat of harming them. Tormenting him on how he’s a bad father.
Jackieboy Man: not being able to save people. Always thinking he’s too late, being haunted by the ones who died before he could intervene.
Dr. Schneeplestein: Messing up surgeries, letting patients down. Petrified of death.
Marvin: stage fright. Being mocked for messing up magic trick. Afraid to take risks.
JJ: Not being seen. Afraid of being forgotten or left behind.
Schneep failed to save Jack. He choked.