create one small flip anim as a precomp.
then bring in however many you want to use and use the align pallete to get them set as you see fit.
set the precomp layers to have time remapping then animate to your hearts content.
depending on how many characters you need to animate, you might want to create to presets to animate from blank to a character, etc
who is that masked man…
https://www.exposedideas.com/