Wishy-washy, and somewhat insecure. Sinclair, while initially seeming mild and meek, is surprisingly serious. While he may seem distant at first, especially with his skittishness, he will eventually warm up to someone overtime through repeated interactions. He is especially caring to those he is close with, looking out for their well-beings and being rather protective of them. He typically prefers to be alone, showing a tendency to isolate himself from others.