As a general rule, anyone over the age of 18 is eligible to be a Trustee. Most often people appoint a trusted family member, good friend, or lawyer. Invite at least one Trustee, but keep in mind that two or three are preferred.
Your Trustees will only get access to your Myend account after you are gone. They will not have access to any personal Myend Messages, even after your passing. After appointing multiple Trustees, you can ask them to take care of different matters.
Trustees are often asked to make difficult personal decisions. Please make sure that you can trust those you appoint as Trustees. If you decide to change your Trustees, you can do so at any point in the future.