@vampiressJazz she did. When she was fighting with Nana in episode 4. And I think there was another scene too... And @izbia150 'kun' is used for boys. For girls they use 'chan'. They also use 'chan' for boys sometimes to make it cute, lol. So yea, I think আপনি mean 'Lucy-chan' অথবা 'Nyuu-chan'. :D
If the girl's are kind of boyish i remember tohru was tohru kun because tohru is a boys name. @flamingwave66 in ep 4 she had that পরাকাষ্ঠা green outfit on and when she was fighting again she had short hair with that outfit.