The name "Sona" is derived from the Latin prefix denoting sound, "son-", attached to the Latin suffix for feminine objects, "a".
A "maven" is someone highly skilled in a field who wishes to teach others in said field.
Sona is the second champion to use the stance mechanic, the first being Udyr.
The name of Sona's weapon, the "Etwahl", is pronounced the same as the French word "étoile", which means "star".
The Etwahl is likely a reference to the guzheng, a Chinese string instrument.
A power chord is a type of chord that consists of a doubled root note and the fifth. It's a key element of many styles of rock music.
Sona is a mute, yet can talk to the Summoner. She claims that only "you" can hear her and says the phrase "From my mind, to yours." This indicates the mental connection between a Summoner and their Champion, which is a recurring feature in League Judgements.
Sona is one of six champions that gain ability power at the beginning of the game even without items, runes or masteries. The others are: Udyr, Galio, Karma, Lulu and Veigar. Viktor also gains ability power automatically, but technically it's from his passive item.
Her appearance and the general musical theme bears similarity to Hatsune Miku.
Each of Sona's abilties have varying ambient music, playing whenever its aura is active.
When Hymn of Valor is the active aura, the League of Legends theme can be heard from the Etwahl.
In her Arcade Sona skin, the stars in the background are identical to the stars in the background of Nyan Cat, a Japanese cartoon that recieved millions of hits on Youtube.
Sona has the lowest health of any Champion at level 1 with 410 HP (+70 per level).