Reinforce Zwei is officially awesome.
She even holds a rank in her own right, although she's only an NCO... I guess she'd probably act as Hayate's adjutant in their normal duties.
Hmm,
nanoha.com seems to be down at the moment - the standard error message it's displaying cites "maintenance downtime or capacity problems." I wonder if they've got more interest than they expected, now that the first episode's aired?