It is the animate form, used mainly for humans (and animals if the speaker chooses):
[Demonstrative pronouns] make a simple distinction between animate (B-class) and inanimate (K-class). In addition, there are two sets of pronouns depending on distance. Thus:
- kesy "this (inanimate)"
- bisy "this (animate)"
- kony "that (inanimate)"
- bony "that (animate)"