孤蛊

'Lonely Toxin' directly means lonely poison. Here, 孤 (gu) represents loneliness while 蛊 (gu) often signifies bewitchment or poison. It reflects a sense of being lost and harmful alone which implies self-sympathy, sorrow, and mysterious charm. The person who uses this nickname usually conveys that they have endured certain pains, but at the same time have a strong inner power hidden from ordinary people.