Individualization of Safina's way of speaking

As a user, I want to be able to customize Safina to reflect my personal style and preferred way of communicating. That way, I feel that she speaks exactly on my behalf and authentically represents my personality.

Acceptance criteria:

• I can adjust Safina's tone of voice (e.g. soothing, professional, cordial).

• The pace of speech and pauses can be adapted to my preferences.

• Key words and phrases that are important to me can be defined.

• Safina uses a pronunciation and intonation that suits my style.