1. An apparatus for improving a character input function in a mobile terminal, the apparatus comprising: a display unit for displaying an auxiliary character input field, a character input field, and a virtual keyboard; a controller for controlling overall operation of the mobile terminal; and an output manager that under control of the controller generates a character input screen comprising a virtual keyboard region and a character input field region when entering a character input mode, and generates an auxiliary character input field that provides information of currently input data that is displayed on the virtual keyboard region, wherein when an input of the virtual keyboard is detected, the output manager outputs information of data corresponding to an input on the character input field and the auxiliary character input field, and the character input mode comprises a mode for inputting at least one of text data, symbol data, and emoticon data.