How to put clothes/hair models on a Splatoon 2 Inkling in Blender?

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In Splatoon 2, the player models and models for the clothes and hair are all separate. Centrixe has thankfully ripped all these models, but I want to combine some clothes/hair models with an Inkling model in Blender. However, Blender imports the bones for the models separately, even though some of them have the same names. So, I don't know how to import them in a way that would make it all one armature that all animates together. How do I do this?

Thank you, and I hope my wording wasn't too confusing.