Messenger v5 shows linked relationships between contacts for ease of accessing family members. These relationships are read from the school's MIS. This information can be accessed by clicking on a hyper-linked contact name (i.e. a name underlined and in blue text).
In the example above, the MIS records that Rachael is a parent of Ben, Claire, Clarissa & James. Clicking on any of the linked children takes you to their contact information and will show a list of any linked relations. In the below example you can see that Francis Abbot is also linked to Ben. 'Siblings' do not show in each other's details, only in those of an adult.