Yes, as mentioned elsewhere, finger-spelling is common when introducing a new person/entity/concept into the conversation.
Regarding the person's expressions, it's common in ASL to employ very dramatic facial expressions to assist and augment the signs themselves to help the "listener" arrive at the correct understanding and feeling.
Regarding the person's expressions, it's common in ASL to employ very dramatic facial expressions to assist and augment the signs themselves to help the "listener" arrive at the correct understanding and feeling.