Thomas and Martha Wayne as Robins

Thomas Wayne: Hi, how are you?
Martha Wayne: Hello, do we know you?

Earth-721 — The World of Robins
On Earth-721, the Wayne family's history is very different from the traditional DC continuity.
For generations, the Wayne and Kane families secretly protected Gotham. The symbol they used wasn't the bat, but the red and gold R of Robin.
🟥🟢 The origin of the legacy
The first members of this legacy were the ancestors of Patrick Wayne and Roderick Kane. They believed that protecting Gotham didn't mean ruling the city or acting like a frightening figure.
Robin represented:
Hope + courage + protection + family.
That's why the title was passed down from generation to generation.
👨 Thomas Wayne and 👩 Martha Wayne
When Thomas Wayne and Martha Kane grew up, they discovered their families' secret.
Thomas received training from the Waynes.
Martha received training from the Kanes.
The two could have created a new symbol for themselves, but they decided to continue the family legacy.
🟥 Thomas became Robin
Thomas was extremely intelligent, disciplined, and skilled. He believed that Gotham needed someone who could protect the people without becoming a figure of fear.
Therefore, he adopted the red, green, and black uniform and became one of Gotham's main Robins.
🟥 Martha also became Robin
Martha had a different philosophy than Thomas.
While Thomas was more strategic, Martha believed that Gotham's protector should represent hope for the citizens.
She also became Robin.
Thus, for the first time, Gotham had two adult Robins working together.
🦇 So why weren't they Batman?
Because Batman simply didn't exist on Earth-721 at that time.
The bat was not part of the family's legacy.
Furthermore, Thomas and Martha did not want to create an identity based on fear.
They believed:
"The bat frightens Gotham. Robin gives Gotham hope."
Therefore, even though they were adults and extremely skilled, they continued to use the Robin symbol.
👶 And then Bruce Wayne was born.