Sunny Emmerich is a supporting protagonist in Metal Gear Solid 4 and Metal Gear Rising: Revengeance. She is the adopted daughter of Hal " Otacon" Emmerich and the biological daughter of Olga Gurlukovich. Due to experiments carried out by the Patriots, she is a child prodigy in computer programming, helping to build Metal Gear Mks 2 and 3 and even building a Mach 23 speed aircraft. She is voiced by Christina Puccelli.