My vision for the Duo/Trio voting (Group F):

Chika and Maru's song will be an upbeat, bouncy song about food and fun things, maybe a party, maybe Christmas themed, maybe both? Riko/Ruby should be the sweetest love song - so sweet it makes you want to squeeze a cat to death or something. Kanan and You are generally ocean/beach/summer types, but who says they can't have fun outdoors in winter? Their song will be the oddball of the group, with the theme being about outdoor winter fun. The tempo will dramatically change multiple times throughout. Finally, the last 3 girls will form a pseudo-GK and perform a spicy winter number, hot enough to melt the snow and my icy heart.