Board Thread:Manga/@comment-33873869-20200317050453/@comment-25933225-20200317064713

He doesn't have "royal blood".

In SnK, when we talk about the "royal bloodline", we talk about the blood relatives of Ymir Fritz. You can call a king whoever you want, that won't give him "royal blood".

After Ymir's death, she has been eaten by her three daughters. We assume that after their death, each one of them was eaten by three persons respectively, giving us the Nine Titans. We can assume that within the nine persons who ate Rose, Sheena and Maria, there were their childrens, and others that weren't related to them. These children were Subjects of Ymir, so, no problem in inheriting a Titan, but the others weren't. And at that time, they could still inherit the power for whatever reason (because the power still needed to be divided ?), making them Subjects of Ymir.

If King Fritz was amongst these persons (but he couldn't as he died before his daughters), yes, he could have inherited of a Titan, one of the nine. But that wouldn't make him a "royal blood" person from a SnK POV. He would just have become a Subject of Ymir in the process, that's all.