Comparative law notes
E&W
There are multiple definitions - click on the translation that matches your context.
defensor judicial means:
full
noun
E&W
someone who brings a legal action on behalf of another person with no legal guardian who is unable to bring suit on their own behalf eg if they are an orphaned child, or if they are disabled and have no family
A person can act as a litigation friend if they can fairly and competently conduct proceedings on the child's behalf.