I actually have a part of me who is anger and nothing but anger. I have a hard time connecting with him. I completely dissociate I cant even get to be an observer
My main voice always fills me in on the "highlights" so I guess part of me is very angry and has no problem expressing anger. However he rarely is present. Maybe a total of 10 times in my whole life and I am 49. Last time he was present was when I terminated with my x-t he came present in full force. That was odd as there has only been one other time his anger came iut to defend me. All the other times it was to defend someone I loved or cared for
Honestly Anger frightens me. He is one of the few parts I am not co conscious with or have not integrated with. Anger is a very hard emotion to deal with. Maybe if you look deep inside you. You might connect.

If you like meditation I have found Tara Brachs guide's loving kindness meditation and forgiveness meditation very healing for me and for a way to safeky start to rwconnect with the part of ne holding different emotions

If you notice I call them parts of me verses alters... I use to have seperate names but as I heal and work towards integration. Which for me was such a scary concept at one time. I find that starting to accept the alters as part of me and not someone to get rid of but to accept with living kindness...the more co concious I become the more our thoughts work in tandum together and the more whole I become as I accepts the parts as part of myself and learn to accept the emotion and feelings that go with it and heal as that part becomes one with me and no longer seperate.......anger however is a very hard part for me to touch... I understand how scary it is to even yry and connect with anger.... when you are ready you will. Maybe talk to your therapist about working on the part that holds fear or some other safer emotion.
I strongly recommend looking up Tara Brach doing a google seaech. Her guided meditations are free and she also has guided learning how to meditate. It really has helped me over a great deal of time to connect safely with the emotions that have seperated as parts. So that then me and my t can work on the trauma and the emotion held by that part. Hope all that made sense