Friendly

Characters that are friendly are on your side. If you hover an NPC that is siding you, their name on their name tag is displayed in green colour.

You can use supportive spells on friendly targets, but no offensive spells. These spells may cast (you can hold down "Shift" to force casting an offensive spell on a friendly target), but they will have no effect, unless you check the "At War" box in your reputation window.

While your pets and guardians are on the same side as you, they will, by default, only use supportive spells on you and your party. This is to prevent non-partied players from monopolizing your pet's attention. If you would like your pet to use supportive spells on non-partied players, you have to instruct your pet to do so. This is done by selecting that player and then double-clicking the appropriate skill of your pet.