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This brain implant projects the user's mood in a spherical psychic field, forcing others nearby to feel a blurred, simplified version of their emotions. It can be an powerful tool to keep morale high, but if the user becomes unhappy, it can lead to collective disaster.
The Psychic Harmonizer is a special psychic implant that projects the mood of the user to other pawns.
It has a radius of 30 tiles with a maximum positive mood effect of 10 that scales with psychic sensitivity. It only impacts members of the same faction and pawns without a psychic harmonizer of their own.
It can be an extremely powerful implant to keep your pawns happy if you install it in a pawn who is easily pleased (or alternatively joywired) however as the description states, it can easily cause problems as well.
Several traits lend themselves to use with the the Psychic Harmonizer. Sanguine and Optimist Pawns obviously synergize ideally with this implant, as they are unlikely to be in poor mood unless really injured. Masochists are another choice for the buffs they get from scars and injuries, making hospital visits much nicer. Psychopaths are also good as they are immune to many of the largest mood penalties. The best pawn to have it in is the Transhumanist, since it counts towards an implant total improving their mood, and by extension everyone else's. Most of these traits' benefits stack, making ideal candidates.