Answer
The captaincy at Arsenal transitioned from Mikel Arteta to Per Mertesacker in 2016. Arteta, a former Spanish midfielder, served as Arsenal's captain from 2014 until his retirement from playing in 2016. He was known for his leadership, passing skills, and tactical awareness. Upon Arteta's retirement, Mertesacker, a German center back, assumed the captaincy, bringing his own strengths and experience to the role.