This page contains spoilers.
- This page is about the character. For the game title, see Deemo.
At the start of the game, Deemo is shown alone in the Piano Room, with a piano before them. After playing a song, the Little Girl falls down from a window above, and they react quickly to catch the girl. Although Deemo does not know much about the girl, they help her get back home by playing the piano to grow the tree in the Piano Room, so that it would reach the window she originally fell from.
Throughout the story, Deemo never speaks. According to the Little Girl in Deemo -Last Dream-, it is not because they do not want to speak, but rather cannot speak. Not much is revealed about them in Memories; their personality only shows through their actions. They are observed to be caring and kind towards the Little Girl. They also seem rather carefree, leaving their books strewn across the floor in the Library.
In Last Dream, Deemo is shown to have a comforting presence on the Little Girl and is able to effortlessly lull her to sleep. The Little Girl also states that their body feels cold to the touch, like ice.
In the story, it is revealed that Deemo and the Masked Lady were acquainted with each other long before the Little Girl appeared.
Deemo only appears as a black silhouette without many features. They have a tall, slender figure. On their face lies two white dots as eyes, and on their upper torso is a hint of a suit with a white bow tie. Deemo's arms are disproportionately long, with lengthy, pointed fingers, especially noticeable when playing the piano. No discernible expressions can be observed from Deemo throughout the game.
- Deemo has an inconsistent number of fingers on each hand (varying from 4 to 5 digits), with there even being cases when one hand has more fingers than the other. This depends on the cover art of a song, the most notable ones being "Untitled2", "Pulses", and "Metal Hypnotized".
- In the Lower Stairs, there is a examinable medal which reads "Piano championship winner, H...", hinting at Deemo's real name prior to the ending of the story.