So Maribel seems a bit too confident that she can control Rimuru. Why? Because she has a Unique Skill "Greed" that can control people with...well...greed. It's shown in the last chapter I think? When he controls Yuuki because the bigger your greed, the easier to control. Supposedly.
But just like any Unique Skill, they really can't ever defeat Ultimate Skill holder. That's not really a common knowledge because Ultimate Skill is not easy to get and people that do have it keep it hush hush. In fact, they're extremely hard to get, actually. But of course, normal people don't have Raphael-san. Our MC here just casually having 4 Ultimate Skills without him even realizing how rare that is LoL
Again this is spoiler!
So Maribel seems a bit too confident that she can control Rimuru. Why? Because she has a Unique Skill "Greed" that can control people with...well...greed. It's shown in the last chapter I think? When he controls Yuuki because the bigger your greed, the easier to control. Supposedly.
But just like any Unique Skill, they really can't ever defeat Ultimate Skill holder. That's not really a common knowledge because Ultimate Skill is not easy to get and people that do have it keep it hush hush. In fact, they're extremely hard to get, actually. But of course, normal people don't have Raphael-san. Our MC here just casually having 4 Ultimate Skills without him even realizing how rare that is LoL