1000+ years later
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A few things have happened in the last millennia.
First off, I canceled my plan to name Rimuru myself and decided to just imprison Veldora in Chloe´s stead. Since I had no clear idea when I was, I spent over 700 years living in the forest, waiting for him to start his rampage.
4 years ago, it finally happened. There wasn't any great battle considering that he was in a mindless berserker state and just flaunted his power. What was interesting however was that the reason why he went berserk was still the now slightly weaker Chloe Aubert.
Not sure why they fought but she was still winning, even without the Infinity Prison. I simply swooshed in during a point of mutual weakness and sealed him in his famous cave for the next 300 years.
Him getting sealed almost made his elder sister, Velgrynd, come after me. Luckily she was restrained by her lover, Rudra.
The other interesting changes were all related to Viliana and Leo.
Leo had somehow made a contract with a Dark Elemental Lord and gained a Hero Egg through it, as well as gained a Demon Lord Seed somewhere. A century ago he finally hatched the egg and grew the seed at the same time, resulting in him growing into something between a True Demon Lord and a True Hero.
There have been heroes who fell and became demon lords but never has there been anyone who was both at the same time, I wasn't even sure it was possible. My best guess was that my main body had somehow made it possible.
Leo gained a shitton of new skills, even several ultimates, but what really baffled me was that he actually gained not just one Origin skill but fucking two. After this, there is no way that my main body didn't pull some strings for that to happen. At this point, he was stronger than me, vastly so even.
The Origin Skill, Demon God of Seven Deadly Sins, was a combination of ALL Sin Series Ultimate Skills on steroids, that included Rimurus cheat Gluttony.
The second Origin Skill was called God of the Afterlife. It wasn't offensive or defensive in any way, you could even say it was helping the whole universe. The moment he gained this skill, he formed a small universe that absorbed all dead souls and dealt with them accordingly. You know, good get rewarded and reincarnated after having their memories wiped, and evil get tortured and tormented until they paid for their sins.
It had many more features like being able to grow by absorbing other afterlives or creating demons but I didn't know them all because I couldn't see them all through my Ultimate Skill, Family Head.
Viliana also got an evolution, though it wasn't even nearly as impressive as her brother´s. She made a contract with a Greater Ice Elemental and because she couldn't get a Hero Egg from any Elemental but Light or Dark, Ramiris allowed her to make a second contract with a lesser Light Elemental due to her allowing her to see Milim again.
Even after so many years, they still traveled and spared all the time, if I didn't know better I would suspect them to be in the same bed.
Viliana also gained many skills, including two Ultimate skills, which was above the norm but still more acceptable than what Leo did.
One Ultimate skill was called Queen of Eternal Ice while the other was called Multiple Weapons, Lord of Martial Creation. Even though the ice skill was above the weapon skill in terms of ranking, I found the weapon skill way more useful since it allowed the creation of God Grade equipment, only one grade below Genesis.
Ultimate skills were ranked Lord-> King/Queen-> God but that ranking wasn't always reliable either.
Three hundred years before Rimuru is born, or even Satoru Mikami, and I still needed to think about how I was going to combine Uriel and Raphael.
Last time my main body didn't allow it for whatever reason and I lost the opportunity and it wasn't easy to find another opportunity.
Maybe I will do it like Kumara and trick Rimuru into giving me another name and get large benefits when he undergoes the Harvest Festival. That fox really was incredibly smart, even Demon Lord Rumuru didn't notice that he named one being nine times.