“I am Roshea of the Aurelis Knights. I don’t want to fight, but I can’t betray my companions. Please forgive me...”
—Roshea's boss quote in FE3.
Roshea (ロシェ, Roshe in the Japanese version) is a member of Hardin's army who joined Marth in his first campaign against Medeus and later joined the Wolfguard. It is said prior to the start of the game, he was a slave but was freed by Hardin. He is one of the two knights Hardin chose to bring with him in Fire Emblem: Archanea Saga, though other than a unique death quote he does not have any new dialogue.
Unlike Wolf, Sedgar, and Vyland, Roshea was doubtful whether Hardin was himself or not after his fall to madness in the second game, but sticks with his friends. Afterwards, however, Roshea once again joins Marth in trying to wake Hardin up, though he fails. In the end, he settled in a town and often offers a prayer for Hardin's soul.
According to the Takayashiki Hideo's Mystery of the Emblem novel adaptation, Roshea is 18 years old. 
Base Stats Edit
Roshea is often not used in Shadow Dragon due to the fact that many Cavaliers join before him, and have greater potential. Although he is expected to come close to reaching the health cap of 60 without Seraph Robes on average, his strength is roughly on par with Abel's, who joined four chapters earlier (eight chapters earlier on Normal Mode) and will be at a higher level by the time he joins. On top of that, he is further hampered by his terrible speed, and he will be doubled by Wyvern Riders and struggle to land doubles even on Generals, making him very difficult to use to his fullest extent.
The best thing about him is his growths, hands down. Like the rest of the Wolfguard, his growths in all stats are astounding, and he is the most balanced of them all. Unfortunately, he is unable to unlock the power that his growths could give him because he comes in so late in the game. His starting speed gives him a bit of an edge over Vyland, but his appallingly bad base stats combined with his high level make him a challenge to use even during the chapter in which he joins, even on the lowest difficulties. This is one character that will need immense amounts of stat boosting items, pity kills, and grinding if he is ever to get off the bench and join the team.
Fire Emblem: Mystery of the EmblemEdit
He retired from the army, but later returned and became a Paladin of Aurelis.
After the war he went to Aurelis, perhaps to offer prayers for Hardin…
Roshea left the army, but later returned and became an Aurelian paladin. Records show he resided in Altea for a time.
New Mystery of the EmblemEdit
"Roshea left for Aurelis after the war. Accounts are unclear, but some say he was present at Hardin's funeral..."
“Prince Marth, I am Roshea of the Aurelis Knights. I have King Aurelis’s permission to come here, and am awaiting your highness’ orders.I am truly sorry for the battle at the pass. To apologise to you, I will join and fight alongside your army. Marth, please watch over me!”
—Recruitment conversation with Marth in Mystery of the Emblem: Book 2
“Prince Marth... It is I, Roshea of the Wolfguard. I received King Aurelis's pardon and have been waiting for you. I am truly sorry for the battle of the pass. I realize that an apology means little, so I will now fight under your banner. But... the other Wolfguard members have all sided with the Archanean army. I wonder if I could persuade them. Vyland, at the least... Vyland might listen to what I have to say.”
—Recruitment conversation with Marth in New Mystery of the Emblem
“Glory to Aurelis!”
—Roshea's death quote in FE3
—Roshea's death quote in FE3: Book 2 before recruitment
—Roshea's death quote in Shadow Dragon
—Roshea's death quote in New Mystery of the Emblem ~Hikari to Kage no Eiyū~ before recruitment
“Ugh... That was... too much for me... I must withdraw for now...”
—Roshea's retreat quote in New Mystery of the Emblem's casual mode