Meta: Quality time. She likes attention and the best way to show her that you love her is by giving it to her. On the other hand, I'd say that she'd be weird on physical touch. I can see grown-up Meta seeking intimacy and physical touch through sex but she'd feel weird about being hugged.

Seneca: Words of affirmation and acts of service. She wants to hear how great she is. She also liked it when people do things for her. Again, she's weird about physical touch like hugging.

Cecily: Unlike the ladies above, she's the sort to hug a friend etc, so physical touch is one of her languages. And acts of service/gifts, because she has actually done so IC too (sending candy to Cash, hosting a surprise party for Theo)

Marcus: Acts of service and gifts.

Ruby: Words of affirmation and quality time. She has an anxious attachment style, so she's the sort to freak out and overanalyze if her partner is distant etc.

Christobal: I'd say gifts and physical touch and he's especially appreciative when someone combines the two