The last remaining member of Purble Cuckleon's guild, everyone else was driven away by how repulsive the guild leader was and was tired of constant and endless bitching about everything, having their personal belongings taken away or destroyed, being forced to cover up any unique traits or being forced to leave when they had a disagreement with Cuckleon and having their quest rewards taken for 'the guild' AKA Cuckleon took their shit and kept it for herself.
She lacks the self confidence to leave the guild because of how often Cuckleon shouts down at her and is told that without the guild that she will never be anything and will fail because she has no friends, she is also afraid of what Purble Cuckleon would do to her if she left. Since Cuckleon and her fuckboys are lazy cunts and there is no one else around, she has had to go on missions on her own, she surprisingly does not always succeed much to the chagrin of Cuckleon, but she has earned a reputation as a remarkable Pokémon to the ones who she has managed to help, many of them feel sorry for her but have no intentions of joining a rescue team. Her dream is to become a respected, kind and strong guild leader herself, so that no more young Pokémon in the area join Purble Cuckleon's guild.
Her poison makes her a good bounty hunter, Officer Magnezone thinks highly of her for being so helpful in capturing lower tier criminals.