HS Trivia #2 corrected
The black queen is always killed by Jack except (maybe) for the alpha kids' session.
In the beta kids' session we see it on [S]Jack: Ascend

In the Alternian session we see it on [S]Cascade

In Caliborn's session we see him explaining how it will happen on page 6193

And in the Alpha kids' session Aranea mentions a thief (who later gets it stolen from a rogue) stole it from the black queen, this is clearly talking about HIC, so it's okay to assume she was the one who killed the black queen in this session. It doesn't discard the possibility Jack was the one who HIC paid for the job tho. Page 6034

The only one instance we don't know about who killed the black queen is the beforan session.
(This trivia was going to be the fifth one but I have decided to end up being the second as a response to Intermission, here it is one of many chess people trivia I have in my limitless trivia chamber!)
The original is still up but when i can delete my own comments i will delete them, I'm posting this one in advance for consistency.