Ena Tria is a recurring leitmotif that plays in various Hyacintho games, most notably Epsilon and Omicron, Fragilis and Pixelverse. It consists of a simple four notes, and it has many variations throughout the games it appears in.
- It is named after the Greek numerals for one and three, referencing how it has four notes. In the song, there is a usually break between the first note and the other three notes, which is why it's named Ena Tria, or One Three, rather than the Greek number for four, Tessera.
- Several variations were released as ringtones on iTunes for 0.99 each on August 14, 2015.