Eri Kasamoto (笠本 英里, Kasamoto Eri) is one of the protagonists in the Metal Slug series.
"You live then you die - all alone..." - Eri's pet phrase.
An orphan who was abandoned in front of a church, her earliest memory is escaping the church and becoming the leader of a street gang. Her leadership skills were discovered by the Government Forces Intelligence Agency, who gave her special training as a spy. Eri, however, found assassination and subterfuge missions to be heavily distasteful, so she applied to be transferred to S.P.A.R.R.O.W.S., of which she was specially granted considering her ability and deeds.
In the Second Uprising, she showed exemplary performance in suppression operations and stopped Morden's Army from executing the uprising. She was promoted to staff sergeant.
Eri has light yellow hair and brown eyes. She wears a green bandana on her head, a green/brown vest with a white t-shirt/tank top underneath, wrist bracelets (sometimes gloves), dark green/brown shorts held by a belt with a silver buckle, knee pads, socks and a pair of army boots.
- Spelling her name backwards (in Hiragana) people will get the name of a famous Japanese pop star Rie Tomosaka.
- Interestingly enough, Fio uses Eri's death scream in Metal Slug 4 but Nadia uses Eri's victory pose.
- Both she and Fiolina Germi were the first women to be introduced in the heroes team in Metal Slug 2 (formerly composed only by the males Marco and Tarma).
- Eri's ability to change the direction of the bombs she throws is quite unique as this has been requested by fans since after the debut of the Metal Slug series.