He is clean shaven and wears heavy armor along with a crested helmet.
A cool headed soldier, he is nevertheless annoyed by Gaku Gramp's excessive worrying over Mou Ten. In addition, his diffident attitude and lack of ambition frustrate Gaku to no end. On the other hand he does take his duty to watch over his commander seriously. Despite being praised as a spear wielder with skills that would make Ou Hon seriously, he himself is humble enough to insist Ou Hon's spearmanship is on a completely different level.
After joining the Gaku Ka unit, Riku Sen's achievements in the battlefield over the years earned him the rank of lieutenant in Mou Ten's independent unit.
Sanyou Aftermath Edit
After the Sanyou Campaign, he lead some unit members to push the Wei back into the mountains. Upon his return, Rikusen informed Mou Ten that the Hi Shin Unit had been on a losing streak in their recent battles. Telling Mou Ten of the Hi Shin unit's failure at Bijin Bridge, both him and Mou Ten were shocked to see Mou Ki who should have been on route to meet Shin.
Coalition Invasion Edit
During the skirmish with Haku Rei, Mou Ten used Rikusen as a distraction to strike Haku Rei.
Western Zhao Invasion Arc Edit
Riku Sen was noted to be reliable commander that possesses amazing skills in wielding spear with Gaku claiming he'd be a worthy challenge for Ou Hon. He is strong enough to be entrusted with leading a squad in the Gaku Ka unit. Being a lieutenant indicates that he has some leadership skills as well. Also, he is confident enough to take part in reckless missions during the combat.