Elise only accepts monster babies, when you talk to him with a monster baby a new option will appear "Sell Child", if the child is an abomination, you need to sell to him 2/4 for their respective Rebirth option.
https://lonarpg.miraheze.org/wiki/Cross_Breeding_and_Rebirth
for the Deepone, Moot, and human baby, you have to leave them to the nun at the church.
Lona can give birth to Orkin and Goblin babies, these can be sold to Elise.
If you want to reborn as an abomination, you need to sell 2 abomination babies that Lona gave birth to Elise using the "Sell Child" option, NOT barter. For a mixed race between Abomination + Moot, you need to sell 4 instead.
You can abandon human, moot, and deepone babies at the church and still preserve the option to reborn (this is so the baby doesn't drain your resources).
