The element H2O (water) has three unique forms.
Water can be in the form of a liquid, the form we see coming out of the kitchen faucet.
It can be in the form of a solid, like ice.
And it can be in the form of a gas, when water boils.
Whether it’s a gas, a solid, or a liquid- it’s still water.
In the same way- God is still God- whether He’s the Father, the Son, or the Holy Spirit.