The character was introduced alongside his twin brother David Tanaka (Takaya Honda), and they arrive in Erinsborough to find their long-lost biological father.

Leo and Amy's near romance attracted some media attention, with Alex McCarthy from TV Week branding it "awkward" and a Metro reporter viewing it as "gross".

Well groomed and image conscious, Leo likes to surround himself with high-end material possessions and is prepared to take big risks to get them.

[7] The mini-series focuses on the twins' road trip on the way to Erinsborough, where they were joined by Leo's love interest Milly (Eliza Charley).

[9] When David and Leo spend more time in Erinsborough they befriend Amy Williams (Zoe Cramond), Elly Conway (Jodi Anasta) and Aaron Brennan (Matt Wilson), setting the characters up to become intertwined in one another's storylines.

Amy overhears Jasmine telling Terese Willis (Rebekah Elmaloglou) that Leo could potentially inherit Lassiters and she informs him about the news.

[14] The show wanted to mislead viewers by publicising a red herring suggesting that historic character Scott Robinson was Leo's father.

Honda told Sophie Dainty from Digital Spy that the Tanaka "family hierarchy is so strange" and Paul's is "insane" because of numerous siblings and children.

She believes that Leo has ill-advised her husband Shane Rebecchi (Nicholas Coghlan) in order to benefit from his urine powered generator.

[35] She discovers that Lassiter's have sold alcohol to Xanthe Canning (Lilly Van der Meer) who is under the legal age to drink.

[35] Kano told Digital Spy's Daniel Kilkelly that he was upset that Leo and Mishti had broken up because they had just begun to find trust in their relationship.

A Neighbours publicist told Claire Crick from Soaplife that Leo realises that Chloe is not just the "bolshy" character she presents herself as and tries to seduce her.

[40] Kano told Sarah Ellis from Inside Soap that Leo is "majorly guilty" for developing feelings for Terese and betraying Paul.

Kano explained that Terese's shooting and a family friend's cancer diagnosis makes him feel that life is short and prompts him to propose.

Leo teamed up with his half-sister Elle Robinson (Pippa Black) to test Paul and Terese's relationship ahead of their wedding.

A publicist from the show told Digital Spy's Kilkelly that Kano returned to filming in March 2021 for a "recurring guest role".

"[49] Of Leo's return to Erinsborough, Kano explained that he has been successful in New York, but some relationship issues has led to him wanting to come home and "reset".

[53] Kano told Inside Soap's Sarah Ellis that there is "a really interesting dynamic between these three men", especially as Pierce and Paul both have people they love involved with Nicolette.

Leo wins the bid for the Men's Shed tender, which he plans to turn into a backpackers' hostel, with Tim Collins (Ben Anderson) as a partner.

When Sonya Rebecchi (Eve Morey) admits that she was responsible for the crash, he orders her to sell her nursery to obtain compensation for the damage.

He puts him up at the Robinsons motel and owner Steph Scully (Carla Bonner) notices Mannix behaving strangely.

When Terese discovers Leo's feelings, she ends their mentorship, but the attraction between them grows and they have sex on the day of David and Aaron's wedding.

They begin a secret fling, which is eventually discovered by a furious Paul; he reacts by evicting Leo from the penthouse, firing him from Lassiter's and sabotaging the Backpackers.

With Amy's help, Leo schemes to bring Jane Harris (Annie Jones) back to Australia, hoping that a new relationship will distract Paul from his tirade against his family.

Delaney's uncle Ivan Renshaw (Michael Shanahan) shoots at Leo, but Terese jumps in front of him and is hit by the bullet.

Although Leo clears up that he did not have sex with Chloe, Nicolette flees Erinsborough just weeks before her due date, leaving David frantic about his unborn child.

Paul tracks down Nicolette and brings home baby Isla Tanaka-Brennan (Mary Finn) to a relieved David and Aaron.

Nicolette returns to Erinsborough with another baby, Isla Tanaka-Brennan (Axelle Austin), who she reveals to be David and Aaron's real child.

Leo later attends Toadie Rebecchi (Ryan Moloney) and Melanie Pearson's (Lucinda Cowden) wedding and reception party on Ramsay Street.

He added that while Kano played Leo's anger "excellently [...] these Robinson men need to find healthier ways to deal with their feelings.