Well, from a purely theoretical perspective, here’s the consensus of each:

Eden: Instant pancake. As said before, Eden has incredibly thick muscle beneath the layers of fat that make up her corpulent rear, meaning that plunging headfirst would more than likely shatter some bones on impact. And if you survive, chances are the rage Eden will have at you for diving into her derrière would be absolutely lethal.

Kara: Cushiony prison. Even if she weren’t fully expanded, the softness of her breasts would cushion the impact, though the confidence at surviving would immediately be replaced by Kara once again intending to keep you in the nonsensical pocket dimension that is her cleavage, where escape is impossible.

Mei: Soft landing. Mei experienced having a pedestrian on a moped accidentally barrel towards her wall of boobage before, resulting in them getting stuck and having to be pulled out by a rescue team. The difference here is that you’d be even deeper within her mountainous mammaries.

Cassidy: Wobbling ad infinity. The impact would most definitely be absorbed by the countless rolls of fat that make up Cassidy’s thighs, though there’s the chance you’d be caught between their incredulous cheeks and forced to contend with a near nonstop jiggling that amount of force would generate.

Renée: Bounced back. Much like Mei, landing upon Renée’s gargantuan gut would have a soft landing, but the force created by the impact would ripple across her belly’s mighty vastness and push it back so much that it would instantly push you back out as fast as you came.