How to say, I am very kind, warm hearted, and shy in person.

in Spanish (feminine)

Soy muy amable, de buen corazón y tímida en persona.

How to say quiet in Spanish (feminine)

Tranquila.

To say "I am very kind, warm-hearted, and shy in person" in Spanish (feminine), you would say:

"Soy muy amable, de buen corazón y tímida en persona."