Ricardo Welkin/Relationships

Anastasia Hoshin
Ricardo's relationship with Anastasia and his membership in the Iron Fang has spanned for more than 10 years. After Anastasia pledged to remove Ricardo's collar, he pledged his alliance to her. He had confidence in Anastasia's dreams for the future and her talent and thus decided to stand beside her to watch her legend grow.

Chuden Agri
When he heard Anastasia went to Banan, he was worried that she might be sold herself as a slave. He rushed through Chuden Group and found out that Anastasia requested Chuden to hire her. Chuden hires her while at the same time, he hires Ricardo to be his bodyguard and a member of a special scout force and nicknames him as "The Hound".

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

Tivey Pearlbaton
Sometime in the past, the Pearlbatons were abandoned by their parents and adopted by Ricardo and Anastasia ever since.

Hetaro Pearlbaton
Sometime in the past, the Pearlbatons were abandoned by their parents and adopted by Ricardo and Anastasia ever since.

Didorii
Didorii was an intimidating man that Ricardo had faced with. He threw insults towards Ricardo and his kind as he wears his fallen member as a fur pelt. Ricardo, in his mind, was honest that he was a little scared of him. He later ambushed the Razcrew company and fought against Didorii. He luckily survived the fight and lopped off Didorii's head.

Reisel
Five years ago before the plot of Kararagi Girl & Cat's Eye, Ricardo was beaten and thrown into a prison of sorts for slaves. He was repeatedly beaten and tortured until he met Reisel. Reisel offered his help in exchange for Ricardo's strength whilst they worked as slave laborers in the mines, and that allowed Ricardo to escape from the beatings. One day, Reisel organized a slave rebellion and both he, and other slaves escaped, however he did not invite Ricardo to it. As a result, the guards took their anger out on Ricardo and beat him nearly to death, as a result of that Ricardo looks on that situation unfavorably. However, Reisel apologized years later, and Ricardo still felt like he owed him a debt for the time Reisel saved him from the torment of his gaolers. After then being betrayed by Reisel, Ricardo destroyed Reisel's shadow clones using his Resonance Wave having directed his anger and frustration at him.

Shiroro Tonerico
In the story Kararagi Girl & Cat's Eye, Shiroro nearly beheaded Ricardo as they fought after a failed ambush attempt on a good shipment that Shiroro was guarding. They eventually came to a truce and remained on cordial terms with each other after the fight.

Roshi
Despite not knowing who he was, Ricardo and Anastasia promised him that if he dies, they'll take care of the Pearlbatons. He still kept that promised currently.

Julius Juukulius
Despite being a lower class and being Anastasia's knight, he views Julius as a trustworthy ally and a comrade. When Julius began to doubt himself during the events of Arc 5, Ricardo lifted his spirit and removed any doubt he had.

Natsuki Subaru
Ricardo showed respect towards Subaru during the events of Arc 3. When Subaru noticed Ricardo was wearing the Hoshin logo, he figured that he knew Anastasia. Ricardo introduced himself in both name and race (as a kobold). On their way to the Flugel Tree to fight the White Whale, he complimented Subaru's ground dragon Patrasche and lifted Subaru's doubts about the outcome of the fight. Subaru realized that Ricardo and the members of the Iron Fang were riding large wolves called Ligers. He asked him a question about whether a large beast man riding a large wolf made it a bit awkward. Ricardo didn't mind it, however, he warned him not to ask that question to the others as he considered 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 gave Subaru a message that the whale was "lighter". This gave Subaru a fighting chance.

Otto Suwen
During the events of Arc 3, Ricardo met with a tied up captive named Otto. While Otto bawled his eyes out, Ricardo handed him a tissue and tried to tell him jokes to cheer him up, but at the same time, he told Otto to man up. This gave Otto hope and the motivation to live. He also promised that he'd keep their conversation a secret.

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. He saved Garfiel from drowning by Kurgan

Roy Alphard
During the events of Arc 5, Roy fought against both Julius Juukulius and Ricardo. Naturally, Ricardo and Roy hold a hostile relationship; even more so, after the Sin Archbishop robbed the demi-human of his own hand which was never located, leaving him permanently disfigured and greatly hindering his combat ability.