This is what looking at that fruit's flesh reminds me of. In the Caribbean it's called Sugar Apple. There is a tree outside my bedroom window at my parents house. As a teen during the fruit's season I would get tired of the Carib Grackles singing up a storm(if you could even call that cacophony singing) first thing in the morning eating the ripened fruit.

There is also similar one that we call Custard Apple. Different islands may have different names for these fruits.

Paw Paw and Atemoya are in the same family as the Cherimoya. All share a rich mix of tropical flavors in a soft mousse texture.

Not to be eaten in very big amounts in any case by their Annonacins (linked with Parkinson disease)