Reno was prepared to take on the Horned King. He did not like fighting, but knew that if they could just free the pig then they could get everyone to safety and formulate a plan for stopping whatever the Horned King was planning. Reno knew it was something, he just didn't know the exact details. Regardless, Reno knew that he would have to fight. Hearing Belle's plan he just nodded, preparing to take on Mika while Belle took on the Horned King. That, however; was not what happened at all. Right when the battle began, which was when Mika stopped talking about whatever, Belle immediately dashed towards the pig and cut it free. 

Right as Belle did this Reno launched a large blast of wind using Aeroja right at Mika with a snap of his gloved fingers, but he moved out of the way to Belle instead, knocking her and Hen Wen out with some strange gas. "P-Put her down!" Reno shouted at Mika as he took Belle underarm, glaring at Mika as Mika talked about a change of location. He knew that with Belle in the enemy's arm like that she was in a large amount of danger, but Reno didn't want to abandon Hen Wen either. He had no idea what to do as Mika opened up the Corridor of Darkness and stepped inside. 

Something though... something deep within him told him he should go. Reno didn't know what it was, but he thought of Jake and the others. He had no idea that Thomas was there, but knew that the others could save Hen Wen from the Horned King. Deciding that saving Belle was also very important he rushed to the portal, but not before waving his hand at the passed out Hen Wen. A cage of dark ice formed around Hen Wen, Reno hoping that it could protect the pig long enough for the others to save her from the Horned King while he went to go save Belle. There was something different about the darkness in and around the ice though. Unlike the ominous darkness of the castle, this darkness was quite the opposite. Pure and uncorrupted. Very serene, like the gentle darkness of a peaceful night. 

After creating the cage Reno rushed into the portal without a second thought, not knowing where it was going, but knowing that on the other side were Mika and Belle, who was currently unconscious and captured by Mika.