Snap has always been in an odd spot age-wise, older than the first pup generation, but younger than the founders and She Strikes. Because of this, she's easily seen as an older sister by her comparatively younger packmates, and thus is very protective of and already attached to them.
Where Strike is almost overly cautious, Snap is dedicated to an extent that's probably not totally healthy, giving her absolute all in every hunt she takes part in.