As soon as he saw her, Bellamy pushed off from where he was leaning against the wall and moved in her direction. His heart leapt into his throat because even if he had been holding onto hope, Bellamy was beginning to worry Octavia would never come back. Growing up, there was very little he cared about that could ever come to equaling how much he cared for his sister. Even his love for their mother grew dimmer as they grew older, but Octavia quickly shaped into his entire world. He was willing to kill the Chancellor for her; he was willing to do anything for her. Even though, these days, their relationship had grown tense and they no longer seemed to be in the same chapter, let alone on the same page, Bellamy still loved his baby sister immensely.
There was no time to be bitter about how much she moved like a grounder. He could always seem through that, anyway. His disdain for the people that continued to betray him were easily cast aside for the pure relief that came with finally seeing Octavia. When she collided with him, Bellamy staggered backward, but even as he did, he was throwing his arms around her and lifting her up off the ground in a tight embrace. He held on tightly, tucking his head against her shoulder and bringing one hand to rest in her hair and let out a heavy breath he hadn't realized he'd been holding since he laid eyes on her.
"I'm so glad you're back," Bellamy said unevenly. He was struggling to carry the weight of Gina's death and every other bad hand he'd been dealt and finally having his sister back somehow made it just a little easier to breathe.