Nathaniel Armstrong

Nathaniel Armstrong is a member of the New Squidbeak Splatoon and a major protagonist of the Inkling Uprising AU series. He is the oldest son of Adam and Naomi Armstrong, the twin brother of Bryce Armstrong, and the older brother of Katrina Armstrong. In the NSS, he goes under the codename of Agent 5. He is also the best friend and love interest of Diana Haynes.

Nathan hails from the Cephalo County, from which he spent much of his early childhood before moving to Inkopolis. He is a veteran of the Ink Sports League, having joined since his 14th birthday and becoming highly skilled. He specializes in the Roller class of weapons and enjoys teaching others how to use them. He is the team captain of the Neo Warriors. His legendary status has earned him the title, "the Warrior".

While walking around the city one day, Nathan heard about the mysterious occurrences happening throughout Inkopolis on the Inkopolis News. He and Diana were later ambushed by a small band of Octolings, and were recruited by the NSS after discovering the manhole to the NSS base, and were partnered up upon recruitment. He is among the most skilled of the organization, rivaling the skill of Daniel Parker and even Hera Braun.