harakter

/xarakter/

Cases

SingularPluralWhen to use it
nominativeharakterthe characterharakterlethe charactersthe plain dictionary form — the doer of the sentence
genitiveharakternithe character'sharakterlenithe characters'the owner — whose it is
accusativeharakternithe character (as the object)harakterlenithe characters (as the object)a specific, known object — whom or what
dativeharaktergeto the characterharakterlegeto the charactersdirection or recipient — to where, to whom
locativeharakterdeat / in the characterharakterledeat / in the characterswhere it is; also having — mende bar, "I have it"
ablativeharakterdenfrom the characterharakterledenfrom the characterswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
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
myharakterimmy characterharakterlerimmy characters
yourharakteringyour characterharakterleringyour characters
his / herharakterihis / her characterharakterlerihis / her characters
ourharakteribizour characterharakterleribizour characters
you all'sharakterigizyou all's characterharakterlerigizyou all's characters
theirharakterleritheir characterharakterleritheir characters

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