After 999 victories in the Giant Axe Arena, Wu Hao finally succumbed in his final battle and was about to be killed. Just as death approached, he suddenly awakened a parenting cheat ability. By simply raising his offspring, he could receive a multiplier of rewards, with the closer the relationship, the higher the reward. Furthermore, the system told him that one branch of his ancestral race, enslaved ten thousand years ago, and his direct bloodline still existed. A powerful will to survive ignited within him, allowing him to defeat an opponent also seeking to escape slavery, regain his freedom, return to his homeland, reunite with his former clan and descendants, and re-establish his own bloodline. Decades later, people watched Wu Hao's children grow up, gradually gaining fame in the Cosmic Genius Battle, becoming renowned geniuses, but...

Good news, I was killed by a train at home.

Even better news: he's become the navigator of the train.

Even better news is that you can travel to the world of anime by train.

What pioneering and interesting things did you do after becoming a navigator?

She was paired with Kirito.

Adopting Lolis from All Over the World

Discussing the relationship between monarch and subjects with a famous queen

The birth of the king was celebrated with a cannon salute; God was lured onto a train; and Shiori almost fell in love with him.

Do these count?

Worlds experienced: Sword Art Online, Black Bullet, Akame ga Kill!, Date A Live, High School DxD, Guilty Crown, Academy Battle, Accel World...

(P.S.: The world-building is mostly from older anime series, with fewer newer ones.)