Complex sentence: She is considered the eight Disney Princess, however, many disagree with this due to the fact that she has no ties to royalty while the other Disney princesses do, however, she does fit into the "mythology" of the franchise.
Split into simpler sentences: She is considered the eight Disney Princess, yet many disagree with this due to the fact that she has no ties to royalty while the other Disney princesses do. She does, however, fit into the "mythology" of the franchise.