Michael
In volume 22, it was somewhat confirmed that Michael duplicated the Supreme Demonic Abilities, just like the King of Greed, Mammon, and the King of Sloth, Belphegor. What do you think? I believe in this theory after reading this quote from Feldway: "The emotions, thoughts, experiences, and everything else of those governed by my supreme ability, Michael, Lord of Justice... Everything was shared with me. Whatever skill levels they have acquired are also within my reach." In other words, Feldway and Michael could even mimic the arts created by the people they mastered and their abilities. Zelario also states this. >> “Listen,” warned Zelario. “Feldway has mastered all of our powers. And so you know, once you show him a technique, it won't work again.”
Examples of this were mentioned in volume 19, when Michael used the Melting Cut technique, which manipulates spirits, in his fight against Rimuru. And for final confirmation, we have Feldway wanting to absorb Veldora's Dragon Factor when it appeared on the Divine Tree. He didn't have that opportunity because he was reserving most of his computing power to control Milim. So, what do you think? Rimuru possesses three demonic abilities stored in the Fertility King's Database.