10(TTIRAAS)

An Au where Ivaraje got freed from their prison sooner without anyone noticing(Feldway was not involved on freeing them) but they were quite weak from how long they were imprisoned and took the form of a small animal which was found by Gabiru and his squad(so after Rimuru defeated the orc lord) who took them back to Tempest.

Rimuru found Ivaraje interesting as they didn't look like any animal they have ever seen so he decided to adopt Ivaraje and 'raise' them, Ivaraje wasn't really happy with it but they thought that having someone help them got stronger would make his plans of destroying the world easier so they let Rimuru adopt them.

What Ivaraje didn't count on was starting to care for Rimuru and the people in Tempest so they started to hide their magicules and presence so the angels and demons wouldn't feel them and try to take them from Tempest.

How anything else would go including when someone found out Ivaraje's true identity? It's up to the writer.