Why is Plana called a colorful angel?

Because of the settings and performance in the game.

According to Jiuyou, the reason why blue file Plana is called colorful angel is mainly her setting and performance in the game. In the game, Plana is an artificial AI sent by aliens from another world to perform tasks in Xialai. Plana's appearance is bright and lovely, so he is affectionately called "colorful angel" by players.

Blue File is a secondary role-playing game developed by MXstudio, a subsidiary of South Korea's NEXONGames, and released by Shanghai Youxing Network Technology Co., Ltd.