Roxy Prime was killed by Heiress Jane when she jumped in front of Rose and took a forky thing to the body. It was heroic, many tears were shed.

1.  So Cal’s hanging in Dave’s dreamroom and Rose comes to visit and throws him out the window and he lands on Bro’s hover board things that’s just kinds flyin’ where ever and that takes him to the ectolab. Lil Cal was then sent back with ecto-baby Dirk. The pre-scratch instance of Lil Cal kept the souls but the post-scratch Cal is empty since there can’t be two at the same time.

2. Gamzee not in Cal couldn’t control Cal but the Gamzee inside Cal was able to use his chucklevoodoo to infest Dave’s dreams because he knew from his past that he would.

My guess is that the Gamzee inside Cal used some chuckle voodoo shit to get in Dave’s dreams since Gamzee in the past but also the future knew that he would cause Cal to get there.  Confusing, I know. So many things about Cal were caused by a different part of Cal, paradoxes are hard to explain.

This is exactly the makes-no-sense bullshit kinda reasoning that’ll catch them illuminatis, you gonna go far kid.

As far as we know, Yes

She could be, I don’t think that was what Hussie intended, but if you want to headcannon her as trans there’s no evidence to stop you.

The pyramids on Roxy’s planet have 5 sides, try again.

You mean Jack English?  Well he was the B2 Jack Noir, he was cuaght trying to assassinate dream Jane and put in Prospitan jail where he stayed for 154 days.  Then he was sent a pumpkin with a bunch of knives and cutting utensils, Crowbar’s crowbar and Lil Cal in it.  Jack looked into Cal’s eyes and got possessed which caused him to stab out his own eyes replacing them with Cal’s and saw off his leg replacing it with a spire from his cell.  Then he killed Jane and Jake and was teleported to the furthest ring by Jade.  And that’s the last we seen him.

Lil Hal is Auto Responder