I would like to know if there is any way to merge the field of a parent template into the child template's existing section. Here is the scenration

Template A has a field under Main Section(FieldA).

Now this template needs to be inherited by 3 another templates (B, C, D). When I do, I want to get the FieldA as part of existing sections of Template B, C, D.

Reason being if I don't merge the field, when I use these child template on an item, I see "FieldA" under "Main" section thrice and its confusing to user as to which template's "Main" section is being edited \ added.