Ally

When a skill refers to an 'Ally' it means anyone whose name shows up in a combat area as green in color. This could mean yourself, a party member, a pet, an NPC accompanying the party (such as Prince Rurik or the Ghostly Hero), a guild battle NPC (such as Guild Lord or Guild Thief), a friendly monster (such as Joe), or any friendly NPC (such as collectors).

The use of the term "target ally" in skill descriptions means that you may use the skill on any of the aforementioned people unless otherwise stated, which is the case with Blood Ritual.

When a skill such as Heal Other uses the term "target other ally", you are allowed to use the skill on any of the aforementioned people, except for yourself.