Erick Leonel Castillo Arroyo, better known as "La Culebra" (born 5 February 1995) is an Ecuadorian professional footballer who plays as a winger for Brazilian club Coritiba and the Ecuador national team.

[1] Born in Eloy Alfaro, Esmeraldas, Castillo joined Independiente del Valle's youth setup in 2011.

[2] Castillo made his professional debut on 29 March 2013, starting in a 2–1 away loss against Emelec.

[4] On 7 January 2014 Castillo joined Barcelona,[5] but was subsequently loaned to Olmedo for one year.

[7] On 5 September 2019 Castillo made his debut appearance for Ecuador against Peru, where he scored to only goal in a 1–0 win.