Her son has his representative, a legal guardian, who has his own lawyer.
Times, Sunday Times
He asks her to put herself forward to become the legal guardian of their son and promises he'll pay for it.
The Sun
She was my legal guardian, signing all of these contracts on my behalf, travelling around the world.
Times, Sunday Times
Participants under 18 must have a legal guardian with them.
canada.com
A legal guardian has been appointed.
The Sun