I don't think you've noticed this detail I make:
So, I headcannon that Liu has Sully chained in his mind hence the saying; pull back the reins.
These chains are always drawn and described as blue.
The reason for this is when Sully uses what I call 'Control Strings' they're red, contrasting colours.
The control strings are basucally little wires that he can form he often uses them to agitate Liu.
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☆ Creepypasta Headcannons ☆
FanfictionI made the cover, don't @ me. Being in this fandom for lets say...2-3 years, I've got a few Headcannons and what's better than to do a book about it?!