That profile is OPEN, so you don't need to be on the Trusted List to edit the profile.
If there are two profiles for the same person, use the "initiate a merge" hyperlink at the bottom left to propose a merge. The merge proposal will require approval (either by trusted list members from both profiles or default approval after 30 days) before it can be completed -- that's a standard procedure here.
And if you want to be on the Trusted List so you can be aware of activity on the profile, the best way to make a request is to use the hyperlink under the "Collaboration" heading on the profile. (That's better than email because it is easier for the other person to respond.) And if that doesn't work, see Help: Unresponsive Profile Managers.