Mild spoilers for Acid Tokyo. Kurogane ponders the difference between Tomoyo, and princess he follows now.
She was not his princess, but she was determined and fearless and brave all the same. She had so much resolution for such a small person, he thought. Sakura did what she could for them and though it wasn't much, somehow it was more than enough. She faced all her challenges with a calm determination, and so Kurogane had come to respect her as she had changed and grown from a timid, shy girl into a brave and beautiful young lady.
No. She was nothing like his princess, but as he watched her selflessly give her feather back to the people who needed it most, Kurogane thought that he could finally follow her anywhere all the same.