There were a few options to consider for a name for the flute: 1. Clear Sound Flute: This name can emphasize the clear sound of the flute and the clear character of the flute holder. 2. Whistle: This name could highlight the sound of the flute and express the unruly attitude of the flute holder. 3. Heartstring Flute: This name can connect the flute with the emotional connection of the flute holder, implying that the flute is a bridge connecting him to the world. 4. Angel Flute: This name could imply that the flute was given by an angel and that the flute holder had obtained supernatural powers. 5. Dream Flute: This name can highlight the dreamy colors represented by the flute and express the dreamy world in the heart of the flute holder. These are some names that can be considered. Of course, the final name choice still needs to be considered according to the plot and character of the novel.