What physical signs indicates who is fronting for you?

Hi, Sirius[Caretaker] (It/She), here. I'm not the host/most active alter here, but we've noticed a few things about our system and I noticed some of it now. We also have only partial amnesia so, thankfully, some memories are shared even if it's only in very limited detail. We noticed that whenever some of us fronts, we have different physical feelings. For example, I don't front often, but usually when I front, our head feels light and "empty". That being said, both Qatar-1 b[Emotional Part] (He/She/They) and Stella[host] (She/They) are partially co-con atm. Whenever Stella gets close to the front, I can feel that a tension headache starts, but it doesn't happen when Qatar-1 b is co-con. Qatar-1 b, is more of a back of the head kind of tension. The tension headache from Stella isn't always present, but it is very frequent. When, Arcturus (She/her) fronts, our head feels "empty" like it feels with me. Also, when Centaurus A[Gatekeeper] (He/They) fronts (He fronts alone) our head feels like nothing. Like if "unimportant" physical sensation was just blocked off.

(Note those aren't actual alter names, but aliases that we use for online purposes.)

We still only formally discovered our system three weeks ago. I feel that knowing these things really help with our denial.

How is it for yall? Do you have different physical sensations?