User blog comment:B214/Chapter 383 Surfing Lucy thoughts and analysis/@comment-24277053-20140509132054/@comment-7418318-20140509143104

He most likely meant Mard Geer.

In addition to what FTGM already said, there are also Kagura, Minerva and Ikaruga, who was the leader of her assasination team. And often also Mirajane, except for her last fight, where she had the help of her brother.