This is something I've noticed as well. I've talked about this with my psychiatrist and she calls this brave, reassured version of ourself the "me-mentor" (jag-mentor in Swedish). Similar to our inner child, this is a core part of our who we are.
The idea, if I understood correctly, is to build this me-mentor more and let it help us feel more safe. Let it support our insecure parts/personas.
Somewhat related, a psychologist I talked to in the 2000s said she really liked the Patronus concept in the Harry Potter books. You imagine an entity that's fueled by your positive memories and emotions, and that protects you from certain anxieties and other stressors.
Things like that seem to be used in at least some schools of psychology.
It reminds me on something my psychologist told me, when trying to find this me-mentor, it can help to take inspiration from someone I find really safe with and trust a lot. Aka someone I have good memories with / of.
The idea, if I understood correctly, is to build this me-mentor more and let it help us feel more safe. Let it support our insecure parts/personas.
(I hope my English isn't too bad)