Most likely, this is a training regimen. But will Echo remain loyal to Roan for long? Or will she stage a coup, not understanding the reason why her leader has aligned himself with the Sky People?
Roan and his right-hand woman train with some sword-fighting. After taking a bullet to the chest, the current Ice Nation King/de facto leader of the Grounder coalition is still understandably weak.
Echo is currently the most dangerous character on the show. She hasn't been brought in on the end of the world secret and all she seemingly cares about is ensuring Ice Nation's rule.