The Bow is a weapon which can be selected for any of your heroes. It is a very flexible weapon, able to hit many opponents at range.
A bow can hit up to three opponents in a horizontal row, and has no range limitation: it can hit any opponent in the field, regardless of how many opponents are blocking your view.
This gives the bow a very broad range to operate with, and does not give any bonus, or penalty on a strike.
Sheila receives an extra bonus when using a bow due to her Innate ability.