Cliffcee

Arcee x Cliffjumper is the het ship between Arcee and Cliffjumper from the Transformers: Prime fandom.

Canon
Cliffjumper and Bumblebee saved Arcee from Airachnid, but they failed to save Tailgate since he was already killed.

They met again when both were captured by Starscream and Shockwave. As Cliffjumper was about to be executed by Shockwave, he goaded Starscream into handling the dirty work instead. However, due to Starscreams incompetence, Arcee was able to stop him and they made their way to Shockwave's new space bridge. During their trick on the Vehicons, Cliffjumper pretended to have been wanting to join the Vehicons after being abandoned by his leader. He told the Vehicons to imagine the look on Optimus' face when the Decepticons attacked him, with himself included. However, as he talked to the Vehicons, Shockwave appeared behind him. Shockwave struck him boldly as the Vehicons prepared to open fire on him and Arcee.

Cliffjumper discovered that Arcee was still embittered by Tailgate's death and helped her move on. Once they arrived at the space bridge, they procceded to sabotage it. Once that was done and Shockwave was supposedly destroyed, they made their escape through the unstable bridge, only to have Shockwave follow them. Thankfully Arcee was able to shoot Shockwave's single optic, buying them enough time to escape and make it to Earth as the Space bridge exploded. The two then found Optimus Prime's team and became new members.

However, three years later on earth, the Decepticons returned and Starscream killed him. Arcee was sad and enraged when she found out about Cliffjumper's death.

Cliffjumper and Arcee were close and good friends. When Cliffjumper was shockingly killed, Arcee felt and still feels sad over losing another partner.

Fanon
Despite Cliffjumper's death, the ship between Arcee and Cliffjumper was fairly popular. In seasons 1 through 3, Arcee still felt sad and enraged for Cliff, even wanting to avenge his death by killing Starscream. Another example is when Miko was upset about Bulkhead's condition, Arcee told her about her late partner, Cliffjumper. In Predacon Rising, when Optimus Prime mentions Cliffjumper's noble sacrifice, Arcee closed her eyes and mourned once again.

In the 3DS version of Rise of the Dark Spark (which is with the aligned continuity family, just like Transformers prime), there are obvious hints at a relationship between Cliffjumper and Arcee. Cliffjumper constantly refers to Arcee as, "darling," and Hound flat out says to Arcee, "I see why Cliffjumper likes you, boss."

The fanfiction writer, Autocon19586, made a crossover story of Sonic and Transformers Prime, with Cliffjumper alive.