Allied minor character

(Machine translation warning) There's a missing feature: placing allied monsters on the map. For example, a location needs to be patrolled by a guard. But it should be a nameless NPC, not shown in the character list. I could simply place the guard's "monster" by checking the "neutral" box. I can manually switch the creature's side in combat, but I'd like to be able to do this during the world design phase.