Lukie is a very relaxed bear who lives in a polar region, he's lucky enough to experience vast ice planes and the shimmering, colourful aurora overhead, which inspires him greatly to be positive and thoughtful. He personifies a certain sense of calm, clarity and wisdom. He reflects the majestic, if not insular nature of polar bears.
In this scene, he's a teenager and is happily pondering- symbolising his lack of comprehensive understanding of existence, but also his desire to learn. He just wants to make sense of the world and himself, whilst at the same time showing he is very grounded. He's very content with where he's currently at with himself, and where he's going in the future. This exudes a sense of personal confidence which he is very humble about.
Text by Luke Bear, I think I couldn't write a better description than his.