I thought it would be "That leader sees", but because "The leader" is in the accusative case, I guess you can tell it's "That one sees the leader".
- Nominative: Jentys (Singular), Jentyssy (Plural).
- Accusative: Jenti (Singular), Jentii (Plural).
Bony is a nominative here, I guess you should use it in genitive form, but I'm not sure which is. I only know Kesy genitive form should be Keson