Bashful

[Hina Muqadas]

Very modest, or modest excess; constitutionally disposed
to shrink from public notice; indicating extreme or excessive modesty;
shy; as, a Bashful person, action, expression.

[GarryDrold]

often feeling uncomfortable with other people and easily embarrassed:

[Rihanna]

Reluctant to draw attention to oneself; shy.

[Cami]

1. easily [embarrassed], [shy], [timid].