Soukou No Strain -

Unlike many mecha shows, it integrates time dilation into the plot. Characters travel at relativistic speeds, meaning days for them can equal years or decades for those they left behind, leading to heartbreaking reunions.

Produced by Studio Fantasia , known for its distinct late-2000s art style. Soukou no Strain

The "Strains" are bird-like robots that use a "Mimic"—a biological interface that creates a deep psychic link between pilot and machine. Unlike many mecha shows, it integrates time dilation