When Kyran decided on the groupings of his Servants and Sigils, he initially wanted to group them according to how he turned them. Ultimately, he decided against it because having a Servant and a Sigil in one group would give them more room to adapt to situations. However, he did have reservations about assigning a Sigil as a leader. It was not that he did not trust them. Instead, he felt this overwhelming sense of their willingness to give up their lives for him.
Kyran could not put it into words, but it was similar to how Zephyr became too attached to him. Come to think of it, Baron, his first Sigil, showed the same attitude. He just did not have the opportunity to 'offer' his life for Kyran.
Kyran heard from Myst that Ames's Sigil worked differently from his. The effect might have been different because they had dragon blood in their veins, but Kyran could not shake the feeling that there was another reason behind it.
