उसी की

that same person's

→ वह
phrase Rare #7,006
that same person's Often means “that same person’s” or “because of that same person,” depending on the words that follow. की agrees with a feminine noun and can also stand alone to mean “the same person’s.”
HI: मैं उसी की वजह से यहाँ आया हूँ।
EN: I came here because of that same person.

हाँ, अब सबको उसी की फ़िक्र है, बस।

Yeah, now everyone’s worried about him, that’s all.

— Pagglait (2021)

उसी की है।

It's theirs.

— Jaane Jaan (2023)