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befriender

n. One who befriends.

Wikipedia
Befriender

Befrienders are carefully selected volunteers, from a variety of organisations and mental health charities, who are trained to provide support and companionship to lonely, or emotionally distressed, people. Befrienders will usually visit for an hour or so per week. The meeting is usually arranged to suit the person's needs, either at home, or at a neutral venue. Some befriending schemes include social events, creative classes, or self-help groups.