Question 1:

Will we be seeing more of Axis in future chapters or will we just be moving on to other villains?

Answer:

I have read stories where they have introduced an intriguing villain or antagonist, have them around for a portion of the story, then you never see them again. In some cases, that may make sense, story-wise. I'm not one of those people. While I am planning a slew of villainous characters, I am of the opinion that if they're not dead or... unavailable, then they should be used. So, expect to see more of Captain Axis Gheit.

Question 2:

Is there a limit the size and weight of the objects that Newb can store?

Answer:

To an extent, yes. Newb's inventory is limited only by its Skill rank, and its own Willpower. The Skill rank will determine the number of items that can be put in there, represented by item slots, while Willpower will determine what size of the item can fit in those spots. "Size" is a combination of Mass and Dimension, in this case.

Question 3:

Does Newb access it's Inventory or Cache as a type of spell, or is it essentially Newb's "stomach"?

Answer:

Newb's inventory is essentially two parts. The storage area is an extra dimensional space similar to a Bag of Holding that grows with Newb's strength. To store an "item", Newb's body expands to "consume" the target. In some cases, this has been called a "Stomach", and in some cases this is called a spell. It would depend on who you ask.

Question 4:

Was Axis Gheit's rage like a Viking, Berserker, or Barbarian type rage?

Answer:

This feature of the Captain's Core is an enraging effect that trades off one's capacity for thought and reason to grant an insane amount of power. There are different "stages" of this rage, allowing him to be partially angry to give him a slight edge, and then completely angry, making him into a killing machine. So, to answer the question, yes. This is definitely a context type situation. Because this world does not actually have a "Berserker", "Barbarian", or "Viking" core, I feel that saying "yes" to all three is appropriate.