Arendt bears a striking resemblance to his mother, with their intense and fierce-looking eyebrows and eyes that convey both sadness and strength. He shares his mother's soft mouth and green eyes, giving him a somewhat enigmatic appearance. It seems as though he carries the weight of the world on his shoulders, but there's also a sense of kindness and empathy about him. Arendt inherited his length from his father, measuring 184cm and has a slender figure, weighing 64kg.

Arendt, like his brother Theo, spends his days working on the farm. Despite his love for animals and his passion for their well-being, he often finds himself lost in daydreaming and exploring the world around him. Arendt has a sharp mind and a strong desire to attend school, but his family cannot afford to pay for his education. Instead, his mother and grandmother homeschool him, and he visits the public library once a week to borrow books. Arendt always chooses one informative book and one fictional book to improve his reading skills and knowledge. He particularly enjoys adventure and thriller novels, and often goes on his own explorations in the area surrounding his home.