You can use my, your, his, her, its, our, or their to show belonging.
You can also use a person's name and add 's to the end.
You can use 's instead of my, your, his, her, its, our, or their.
This is Jalene's backpack.
This is Luke's backpack.
This is Mr. Gaffar's backpack.
You can use a proper noun or a common noun.
This is my sister's backpack.
This is my friend's backpack.
This is my teacher's backpack.