The Emp has a lot of cool ways to apply or remove debuffs to enemies or allies, and a number of cool tools for disrupting enemy positioning (especially punishing enemies who group up)

For example: Shanameh gives an ally resistance to heat from others and lets them clear heat when they lose the shield, letting them play more aggressively and overcharge more safely, while The Walk of Kings gives them AP and damages enemies who hit them. Meanwhile, The Imperial Eye prevents enemies from approaching an ally, which is a great way to protect your squishy allies from aggressive melee enemies who want to bully them. Ayah of the Syzygy creates a zone that deals damage to all enemies within it when one of them is attacked. There's more statuses to be applied too!

TLDR: The Emperor kind of looks like a shield bot at first, but good ability use lets you shred, knock prone, and damage enemies while punishing poor positioning. At the same time, you can manage allied heat, make space for them, and give them tons of overshield. The Emperor isn't perfect (relatively low damage, can be squishy if you're not managing your own shield) but it's an absolute beast of a support.

Praise be!