I absolutely love Lucius' supports/relationships with both the Cornwell siblings, and with Serra as well. I ship him with Raven, and sort-of-ship him with Priscilla (but this, in my mind, is like one of the most train-wrecky ships of all time) and even though I sort of like Lucius/Serra, I like her a lot more with Oswin.

And Karel's just the definition of a BAMF.