Rajdhani, a middle school student of Indian heritage, sports black hair, brown eyes, and a brown complexion, typically clad in a standard Japanese school uniform accented by a blue tie. Renowned for his logical and methodical approach, he navigates the alternate dimension "This World" with relentless curiosity, dissecting its laws to uncover escape routes to their original reality. His open, decisive nature fosters trust, leading to strong alliances with Nagara, Nozomi, Mizuho, and Asakaze.

His "Pocket Computer" ability materializes digital programs into tangible gadgets, crafting tools that decode the enigmas of drifting dimensions. These constructs birthed innovations like autonomous robots and a digital currency system. Over two millennia traversing realities, Rajdhani discerned each realm's unique laws and the privileged status of certain inhabitants. Temporal distortions stretched his personal timeline to 4250, marking centuries of relentless exploration.

As a key architect of "Project Robinson," he engineered a homeward-bound rocket alongside Nagara and Nozomi. Yet when completion loomed, he remained behind, embracing the drifting worlds as his home. Millennia of solitude forged a philosopher who found beauty in impermanence. His tales of a student who "invented death" through self-erasure became parables of existential resilience.

His corporeal form eventually fused with a forest in one realm, roots intertwining with soil as he merged into the ecosystem. In farewells to Nagara and Mizuho, he championed progress over nostalgia, imploring them to face tomorrow's uncertainties. Rajdhani's enduring legacy intertwines empirical rigor with metaphysical contemplation—tools and wisdom paving paths for others as he vanished into the drifting expanse, ever chasing horizons.