Unassuming

[Sarah]

Not assuming; not bold or forward; not arrogant or presuming;humble; modest; retiring; as, an unassuming youth; unassumingmanners.

[Sarah]

Code for a shy, intoverted, and possibly socially awkward individual who does not have social etiquette mastered.

[Gregory]

Not pretentious or arrogant; modest.

[Tina]

Someone who is unassuming is quiet and shows no wish for attention or admiration: