Create a futuristic, full-body portrait of Big Sir from DC Comics. The character should be displayed in a realistic style, wearing an advanced suit that could both augment and harness his superhuman strength. The suit should have a robust and heavy-duty design, indicative of his power, but with a non-threatening, gentle aesthetic that reflects his childlike innocence. It may include visible technology, like circuitry or power gauges, that suggests the control and enhancement of his abilities. His pose is strong yet non-aggressive, highlighting the juxtaposition of his might and his gentle nature. The background should be slightly futuristic, indicating a high-tech environment that could be part of Big Sir's story.