Together.
That was the only way to describe how he felt. The brand new fusion threw a few test punches in the air and was satisfied with the balance they had. Various other moves proved to be the same. The flaws from his two halves had disappeared in his whole. At least the fighting flaws. Internally he was a mess. Both of his halves had always been stubborn and now it turned out the two had been keeping secrets from each other. They didn't have anywhere to hide them anymore. Nearly twenty years of emotions were combining all at once. The more he dwelled on it the more overwhelming it became. He hovered cross legged in the air and tried to meditate. After a while he could sense the two calming down a bit. He smiled proudly.
"I can do this." he said to himself. Finally speaking aloud revealed his voice to be rather deep with a familiar smugness. He liked his voice.
"I can do this." he repeated. He was a little louder this time. There wasn't anyone nearby to hear him but he did it none the less. It made him feel comfortable. Slowly he uncrossed his legs and floated a little higher. His halves hadn't felt excited about flying in years but now the experience filled him with a sense of wonder. They may have flown before but he hadn't. He stretched his limbs and looked towards the sky. He wondered why it looked brighter than one half remembered until he blinked a few times. Right, he had three eyes. He started to laugh despite himself.
Everything was a new experience for him. After all, he had never existed before a few minutes ago. He laughed louder and shot up into the sky. On his way through the clouds he tested one of his halves techniques. Sure enough it only took a few seconds for a second set of arms to grow from his shoulders. With another laugh he flew up above the first cloud layer. He reached out one set of arms to ethier side like wings and wrapped the other around his torso. He let himself drop down as he took in all the sensations he was experiencing. He knew he would only have half an hour to exist before he had to seperate. He found he didn't mind. As long as his halves stayed together he'd get to be himself again.