Serena didn't cry like Emma did. They just found out the Looker is leaving and not only that, but it was all lies. Although Emma had tears streaming down her face, her pain paled in comparison to what Serena felt. She was closer to the Looker than Emma was. They knew each other longer. Her world was crashing around her. If she had been honest with herself she would have realized, she fell in love with him.
Yet, even as Serena's life lost all meaning, she wouldn't cry. Couldn't. He taught her to be stronger and she knew he wouldn't want her to cry. She just watched Emma and Mimi run out in hopes of finding him.
Serena, herself, slowly made her way out of the Looker's Bureau in a numb state. She knew not what to do, so she wandered Lumiose City aimlessly. Memories began to play through her head, all the things she and the Looker had done together.
He had given her meaning after she declined to becoming the Kalos Champion. She had been so lost after that, wasn't sure what she wanted to do with life. Then, when she once again was going to show Professor Sycamore what little progress she made on the Pokedex, he contacted her. She had been confused and wasn't sure if she could trust him, but she went to him anyways. He taught her how to be like him and they became partners . They did everything together. Weeks later they met Emma in an alley, she could feel they drifted a bit farther apart, but they were so close. Now, she wonders if it meant anything at all. One little letter and everything. Still, she was numb.
Serena was so lost in thought, she didn't realize she was outside Professor Sycamore's lab. She didn't even notice he was in front of her, calling her name while slightly shaking her shoulders. Finally, he took his hand and brought it up to her face and snapped, catching her attention.
"Huh," she muttered dumbly. Sycamore frowned, something was terribly wrong with Serena.
"Come inside," he whispered. He lead her into the lab and up to the third floor. He clasped her hand and gave her a reassuring smile as they made their way into his office.
Once there, he turned to face her. He heard that the Looker had left and new Serena would be devastated, he never liked the fellow. Serena stopped visiting the lab since becoming his partner. He was afraid to admit it, but he was jealous of the Looker and how he stole Serena's attention. He had to help her now, though. He knew she wouldn't cry, but she needed it.
Professor Sycamore enveloped her in a tight embrace, reassuring that it was okay to let the tears out. She immediately broke down into tears, clutching the Professor, afraid he would disappear, as well.
His arms still tightly holding her, he dragged her to his office chair. He sat down and let her crawl onto his lap. She leaned her head against his shoulders, the stream of tears finally slowing.
He once again wrapped his arms tightly around her, the broken-hearted girl he loved. Eventually, her breathing evened out and began to sleep. He followed her and began drifting to sleep.
I didn't mean to make it this long and I still have to add more. It was supposed to be real short :/ So this is probably going to have maybe a chapter or two more.