What does the Appointor do?
Technically, the appointor (in our deed, and similar deeds) has the most control of the trust because they can appoint and remove the trustees who exercise the various trust powers.
Appointors will generally be assumed to be "joint appointors", unless we are otherwise instructed that one or more appointors are to be independent. Joint appointors have rights of survivorship, which take a kind of 'last man standing' approach. For example, if Husband and Wife are joint appointors and Husband dies, the Wife becomes sole appointor.