This paper investigated the effect of the blocking effect, which has been suggested for cross-linguistic behaviors of long distance anaphors. First, this paper started by showing several pieces of evidence that the Korean long-distance reflexive caki, like casin, is an anaphor, despite the fact that the distinction between anaphors and pronouns in Korean is not as transparent as in English. Second, I suggest that the only difference between caki and casin is that caki is inherently a third person, while casin is uninflected for person. The fact that casin and caki differ in feature composition can account for why caki should only refer to an antecedent with which it agrees in person. And then I show that unlike Cole and Sung’s claim, LD reflexives in Korean do not manifest the blocking effect. Finally, I suggest that lack of the blocking effect in the Korean LD reflexives caki and casin may be due to the existence of Agr. In spite of the lack of overt subject-verb agreement with respect to person, number and gender in Korean, I suggest that the honorific agreement in Korean can be strong evidence of the existence of Agr, and that the feature [+H] in Korean may be one of the Φ-features.