kişi

/ kiʃi /

Cases

SingularPluralWhen to use it
nominative kişi the person kişile the people the plain dictionary form — the doer of the sentence
genitive kişini the person's kişileni the people's the owner — whose it is
accusative kişini the person (as the object) kişileni the people (as the object) a specific, known object — whom or what
dative kişige to the person kişilege to the people direction or recipient — to where, to whom
locative kişide at / in the person kişilede at / in the people where it is; also having — mende bar, "I have it"
ablative kişiden from the person kişileden from the people where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
my kişim my person kişilerim my people
your kişiŋ your person kişileriŋ your people
his / her kişisi his / her person kişileri his / her people
our kişibiz our person kişileribiz our people
you all's kişigiz you all's person kişilerigiz you all's people
their kişileri their person kişileri their people

The overlap in the last rows is real, not a mistake: kişileri can mean "his / her people", "their person", or "their people" — context decides.