Seamus O'Sullivan

"Oi, name's Seamus. And who might you be, love? Haha, I'm only joking. We're all brothers and sisters in arms now, eh?"

- Seamus to Hanna

Seamus O'Sullivan is an Irish TITAN Operative recruited by Major General Allison Halsey in 1940 and began serving under TITAN Captain Norman Dawson. He previously fought with the King's Guard in order to get close to the fighting.

When he became part of TITAN, he viewed both Norman and squadmates as "brothers and sisters in arms", though both Hanna Solé and Solveig couldn't figure out whether or not he was being sarcastic or not, as he was known for. He had an intense desire to fight against the Axis Powers when World War II began, which was one of the factors in him joining the King's Guard.

Seamus is one of the playable characters in the Black Ice Zombies storyline in maps that feature TITAN as the playable faction.

Personality
Seamus was a sarcastic but very reliable soldier in the King's Guard and in TITAN, as noted by his superior Norman Dawson. Although his sarcasm often annoyed Solveig as she could not take him seriously and questioned on why he would joke even in the most life-threatening situations. Though, her (and everyone else's) opinions did not get to him, as he simply just brushed them off. Despite this, he held off on jokes and his sarcasm in certain situations, as evident during a raid on a Nazi German outpost, he suffered an injury protecting Solveig from German soldiers.

As a teenager, Seamus was extremely fascinated by explosives and had created many home-made explosives he used around his family's farm. This behaviour was influenced and heavily encouraged by his older brother George, whom was actually killed in action in the early stages of World War II. This prompted him to join the King's Guard and developed his sarcastic ego overtime, in order to not dwell on the death of his older brother as to avoid being overtaken by grief and anger.