Nani Pelekai, the older sister of Lilo in "Lilo & Stitch," is generally portrayed as being about 18 or 19 years old in the original 2002 animated movie. She is a young Hawaiian woman who acts as Lilo's legal guardian following their parents' death and tries to balance her responsibilities while caring for Lilo.

In the live-action 2025 version, the actress Sydney Elizabeth Agudong who plays Nani is 24 years old, but the character's age is consistent with the original portrayal of a young woman around 18 years old.

Thus, Nani is typically considered to be around 18-19 years old in the original story context.