From Day 3: Abajo (Downstairs)
Encantada
A woman says encantada when meeting someone; a man says encantado.
Hear it in the conversation
Amparo
Encantada, Marta.
Nice to meet you, Marta.
This is the same -a/-o pattern as bienvenida/bienvenido.
Notes explain it. The conversation makes it stick.
In Formula 100 you hear each phrase in a short scene first, then recall it from memory. The phrases come back in your review deck just before you’d forget them. From Week 2, you also rebuild each conversation in Spanish a week later.