Soraka's ability icons have been changed twice, the first time for her visual update and the second time for her gameplay update.
Soraka was designed by RIOT Takai, later fired as a Riot Games employee but still continued to play League of Legends under the Summoner Name AlaDeLaColt.
e"Yes, that was a banana. *giggles* No-one expects the banana!" is a reference to the community nickname for her conspicuous basic attack projectile. The second part of the joke may also be a reference to the Monty Python sketch The Spanish Inquisition notable for the catchphrase "Nobody expects the Spanish Inquisition".
This could also be a reference to the 'banana kill' meme that is used in tournaments and other live events, where an "unexpected" last basic attack by Soraka kills off an enemy and the crowd goes wild about and/or the commentators commentate on how the last banana got the kill.
Soraka knows of the Bard, and as a Celestial Being, she has deeper ties with him as well.
In the previous lore, Soraka was deceived by Warwick in his attempt to rip her heart out.
Soraka revived a nearly deceased Irelia during the Noxian invasion of Ionia. She did so by binding her life force to her hiten blades.
Due to Karthus being a being that embodies death and Soraka being a celestial deity of life, they are both rivals; this is reflected in both of their ultimate abilities: Karthus damages all enemy champions, while Soraka heals all ally champions.