Erza is a very strict person, often criticizing the bad behavior and habits of the other guild members, causing most of them to apologize, fearing that they might invoke her wrath. She is also very impatient, disliking people who don't answer her questions quickly enough. This, coupled with her own tragic childhood, caused many of her guild mates to avoid her due to her social awkwardness. However, she has a great sense of justice and pride in being a member of Fairy Tail.
According to Lucy in the letter she wrote for her mother Erza is "cool and beautiful, warm and full of passion", while to Erza Knight walker she stated that Erza is strong, cool and a little scary but relied on by everyone, even so she can be really girly and liked sweet things and cute clothes. Jellal, when he had lost his memories, remembering nothing but the name "Erza", said her name was "full of kindness, brightness and warmth".
Erza describes herself as someone who was always crying, since she wasn't able to protect those dear to her. Several examples are when Rob tried to shield her from destruction, and when Jellal was captured because he saved her and was brainwashed by "Zeref"....