Bannakaffalatta

Bannakaffalatta was a cyborg Zocci aboard the Titanic. He had an accident some time ago, and as a result, he underwent conversion into a cyborg, for which he experienced some shame. Bannakaffalatta disapproved of shortened versions of his name.

Biography
Onboard the Titanic he met the Doctor and briefly strolled around London on Christmas Eve on a tour led by Bayldon Copper. As Bannakaffalatta was small he was able to get through spaces others could not. He revealed his cybernetics to Astrid, to whom he took a fancy and asked on a date, which Astrid accepted. Over a short period of time, he grew to accept his nature as a cyborg. While traveling over the bridge in the Titanic, Bannakaffalatta got across with ease but when the Hosts descended upon the small group of survivors, he used his cybernetic body to release an electromagnetic pulse to destroy them and give the Doctor and the others time to escape. With little power left, Bannakaffalatta died. Astrid used his EMP transmitter ("battery") to destroy other Hosts. (DW: Voyage of the Damned)

Behind the Scenes
A newspaper, The Sun, released a report prior to the broadcast of Voyage of the Damned claiming Bannakaffalatta was called Porg and would be attempting to kill Astrid.