Do you mean Aunt?
If you are talking about your aunt, Tía
el padres. hermana, y tio.
It is "Como una hermana".
"Hermana" in English means "sister."
hermana
Hermana is Spanish for "sister."
Dónde está su hermana.
Hessel Hermana died in 876.
You already have as the word 'hermana' means 'sister'.
tu hermana
Hermana is in Spanish. It is the Spanish word for "sister."
"Tu hermana" means "your sister."
I don't know if you meant: "¿Está tu hermana?" (is your sister there?) or "¡Ésta, tu hermana!" (and your sister! Emphasising "your")