Emo – a character that can implant any emotion into any sentient being by the force of will
In weaker form, it could be limited to 1 at a time, or with some range limitation and exclude machines.
In a more powerful form, it could have no limits in the range or quantity of affected beings and include also ones that are normally incapable of feeling emotions (eg robots).
It could be either/any gender and any/either race. Defining characteristics could be “emo” style (hairstyle, makeup).