It's subtext. Tons of subtext. If you consider the Drama CDs canon, which 7Arcs do, MASSIVE FUCKING OBVIOUS subtext. Hayate likes to squeeze boobs, Subaru confesses her undying love to Tiana, Nanoha and Fate sleep in the same bed, Arisa makes various "why y'all so gay?" comments and Suzuka enjoys it all.
Oh yeah and Caro is dumb but funny.>>9624314