Rojeel

Rojeel, was one of Itsuki's party members before the Spirit Tortoise attack. He was one of the members that helped Rishia when they first found her.

Appearance
While Rojeel's appearance is not described in the light novel, the anime depicts Rojeel as a large, plain main wielding an axe.

Abilities
Not much is known about Rojeel except he was second to Mald in combat abilities while in Itsuki's party.

Volume 6
Itsuki's party including Mald and Rojeel dispose of a corrupt nobleman and save Rishia. Rishia then joins their party.

Volume 12
While not mentioned directly, Rojeel is assumed to have left with Mald and Malty after they had manipulated Itsuki into unlocking the curse series of pride. The group had lived lavishly in Zeltoble and created a massive debt for Itsuki before they escaped.

Volume 19
Rojeel had apparently joined Mald and Malty in joining the Third Army. After Mald was defeated by Itsuki and his group, he claimed that Rojeel would come to save him.

Itsuki Kawasumi
To Itsuki, Rojeel was a trusted companion who helped him become a hero and enact "justice". However, when Rojeel was given the opportunity to join Malty, he decide to betray Itsuki for an easier life.

Mald
Mald and Rojeel seem to be close from when they were both Itsuki's companions to when they started working with the Third Army together. Even though Mald was disgraced and lost the Vassal Axe, he trusted Rojeel to come to rescue him. However, Rojeel never came to save Mald.

Itsuki's Party
Itsuki's party remained fairly consistent since he was originally given a party which allows the group to establish a rough hierarchy. Mald was considered the first in command after Itsuki, with Rojeel after him. Welst and the Spear Girl were in the middle with Rishia at the bottom until she was ejected. Those at the top got preferential treatment compared to those at the bottom. Eventually, Itsuki's party abandoned him and at least some like Mald and Rojeel joined with the Third Army.

Trivia

 * Another translation for Rojeel's name is Roger.
 * In loop 4 of The Reprise of the Spear Hero, Rojeel was also Itsuki's companion even though Itsuki was the only hero working for Melromarc.