The awakened god bloodlines didn't just affect a person's physical aspects, but also their mental aspects.
Whenever someone awakened them, the bloodline enhanced specific physiological parts of that person's core to make them more suited for it over time.
According to the name of Rion's bloodline — The Monarch of The Crimson Throne — he could guess that his bloodline was related to both war and throne, which meant his bloodline was supposed to change him in a way that he was suited for both of them, and he believed confidence to be such a quality.
After being motivated by the humanoid monster and broken down by the grief of the tribe members, the bloodline began to affect him in a way that was more profound than it ever had been before, and unbeknownst to him, he had reacted in a manner that was unlike him.
'Everything still turned out fine,' he thought while dodging the barrage of attacks from Zoka and Drokan, who were attacking him in a strangely familiar coordination.
