All our three cats are now getting along well. Gothmog the Black and Nenya the White spend a lot of time playing together.
Fankil is still shyer, and panics if there's a loud noise, but he seems to be becoming the most snuggly of the three. Gothmog and Nenya like playing exciting games (though Gothmog likes to snooze on PP's desk of an evening) but Fankil likes quiet moments and having his tummy tickled. We can pick him up now, and he purrs and snuggles.
However, last night Some Cat jumped on the bed at ten to 6 in the morning, landing on Pp's face and causing him to splutter in alarm. Said cat then panicked and fled across Pp's face and then mine, leaving Pp with an impressive set of facial scratches, and me with a couple of small punctures to the cheek. Neither of us was awake enough to really register which cat did this, but the MO definitely suggests it was Fankil.