General NPC/Monster reactions based on Leon’s method.

This implements my own reaction table, as described at D&D Monster Reaction Charts Compared. The intent is that you move the interaction through three phases, generally divided by exchanges of dialog but not necessarily only one round long.

1. Determine initial attitude without the benefit or penalty of charisma. Apply ±4 for any non-verbal biases, such displaying the symbols of an enemy tribe or being a filthy barbarian among perfumed concubines.
2. Roll again, applying relevant charisma bonuses. Ignore the biases from first impressions, but include any new information. Friendly gestures or bribes promote a friendly reaction. Rude or aggressive behavior promotes negative reactions. Consider the actions of participants.
3. Make one, final roll. Conclude the encounter with role-playing or combat.