Iria is an Undine who appeared in chapter 4 in Tetyth. She is found amongst several demons who have captured her, so Ein and his party have a choice to save her or not. She later escapes, but you are able to meet her sister, Aria, a little later in the game. As a token of their appreciation, they later give Ein Iria's Bow.
Iria is a shy Undine of little words. She looks very similar to all the other undines shown in game, but she acts very differently to her sister Aria. She is slightly similar to Meute in terms of her personality.
"They look alike, but they're totally different." - Cierra