Bernie

Bernie (バーニイ) was an adventurer and the third member to join Masayuki's party. He is an Otherworlder from the United States. Secretly, he was the seventh-ranked of Rudra's Imperial Guardians.

Personality
Bernie was often the voice of reason in the party, constantly looking out for the team and gave Masayuki a lot of advice. He appears to be able to resist Masayuki's Chosen One by possessing a Unique Skill, but he respected Masayuki regardless.

After his identity as an Imperial Guardian was exposed, he started showing a more formal side of him in his military capacity. The difference in behavior from his time travelling with Masayuki shocked Rimuru, betraying his impression of Bernie being Masayuki's "long-suffering lackey."

Background
He was a graduate of Freedom Academy and an otherworlder under Yuuki’s protection. Having been born in the United States, he could only speak English when he arrived in other world, making communication with Yuuki completely impossible. That’s when magic came in handy, and ever since then, Bernie became obsessed with magic, hoping to study at the academy. He became an adventurer rather recently, and he was looking for companions. That's when he joined Masayuki's party.

The party progressed at an overwhelming rate. In only about half a year, they were given the nickname “The Shining”. Although Jinrai was ranked C+, his strength was comparable to that of a Rank B. With the additional aid of Bernie's magic, they were able to safely handle any quest they attempted.

Chronology
During the war with the Eastern Empire, Bernie and Jiu were exposed as secret agents of Rudra sent by Damrada to guard Masayuki. Following the orders of Tatsuya Kondou, they attempted to kill Rimuru, but were defeated and killed in the ensuing battle with Chloe and Benimaru, respectively. They managed to escape the Dungeon using Resurrection Bracelets, but were subsequently hunted down and killed again by Diablo; Rimuru resurrected them afterwards, albeit in a weakened state. The duo reconciled with Masayuki, and protected him while he was being pursued by Cornu. They returned with Masayuki to the Eastern Empire and assumed duties as his escorts in his new regime as emperor.