Cristina Yang is the heart of Grey’s Anatomy, making news of Sandra Oh's departure after the upcoming Season 10 particularly heartbreaking. Throughout the show's nine seasons, she's been through a lot, including crumbled relationships, an abortion, divorce, and narrowly surviving a plane crash. But with Cristina’s independent, fearless nature, we knew she’d pull through: when things get tough, she cracks a few dry jokes and gets going. 

To celebrate her time on Grey's, here are some of Cristina’s best moments in Season 9. Trust us, a roundup of her best moments ever is coming, too... after we dry our tears.

Cristina and Meredith’s iPad chats. While Cristina worked at the Mayo Clinic and Meredith was still at Seattle Grace, it was the only time in the history of their friendship that they’d been apart. But they made their long distance relationship work like champs by FaceTiming 24/7 on their iPads. We loved seeing Mer and Cristina stay in touch this way.

Cristina tries to save Dr. Thomas. Although we loved Cristina’s Mayo mentor, Dr. Thomas (Feeny to us), his fellow doctors thought he was way too old for his job. Cristina disagreed, and so did we — he was a nice guy and she had a lot to learn from him. So instead of trying to push him out of his job, Cristina tried her best to make him feel appreciated. And even though Cristina couldn’t save his life, she was the only person in that hospital to show him respect in his final days.

Cristina gets her way with Dr. Russell. After dealing with the politics and money stuff that came with buying a hospital, Cristina was itching for an exciting new case, so she was super excited when Dr. Russell asks her to assist with his cutting edge experiment. But he didn’t actually want her help — he just wanted her money. Obviously, this wasn’t going to fly with Cristina, so she did the only thing there was left to do: use her board member card to make his project her project. Okay, maybe not the most ethical move, but that d-bag totally deserved it.

Cristina bonds with Alex. When Alex came to Cristina feeling down about his non-relationship with Jo, she... actually comforted him? So not a Cristina thing to do, but we loved when she let Alex share her bed —  almost like he was filling in for Meredith. It made for a pretty adorable scene... and we’ll pretend that Cristina didn’t make fun of Alex the next day. Actually, now that we think about it, Cristina and Alex actually make the perfect BFF pair.

What are some of your favorite Cristina moments from Season 9?

Catch the Grey’s Anatomy Season 10 premiere on Thursday, September 26, 2013, at 10 p.m. ET/PT on ABC.