(Before reading this, please account that this is an opinion, and wasn't made to offend any users/fans)
Fairy Tail is an anime about wizards who are in guilds. The main guild that is portrayed in this anime is called Fairy Tail (hence the name). The main character, Natsu Dragneel, and his cat Happy, travel around the nation known as Fiore. Frequently seen with Natsu and Happy are: Lucy Heartfilia, Erza Scarlet, Gray Fullbuster, Wendy Marvell, and others.