Ricardo Welkin/Relationships

Anastasia Hoshin
Ricardo has confidence in Anastasia's dreams for the future about her talent and decides to stand beside her to watch her legend grow.

Mimi Pearlbaton
Sometime in the past, they were abandoned by their parents and adopted by Ricardo and Anastasia ever since. In the events of the 5th arc, Ricardo recklessly attempts to find Mimi alone, even if it means disobeying Anastasia's orders.

Natsuki Subaru
Ricardo shows respect towards Subaru during the events of the 3rd arc. On their way to the Flugel Tree to fight the White Whale, Subaru realized that Ricardo and the members of the Fang of Iron are riding large wolves called Ligers. He asked him a question about a large beast man riding a large wolf makes it a bit awkward. Ricardo didn't mind it, however, he warns him not to ask that question to the others as he considers that question offensive. During the fight against the White Whale, he saved Subaru by taking the hit, sustaining major injuries in the process. In exchange, he gives Subaru a message that the whale is "lighter". This gives Subaru a fighting chance.

Garfiel Tinsel
Ricardo was suspicious at Garfiel's relationship with Mimi at first, but when Garfiel transported the near-dying Mimi to the hospital, Ricardo shows him his gratitude by giving him a Saikeirei-like bow and treats him as a companion.