[Question] About the MC of Backstabbed in a Backwater Dungeon.

Reading the preview in J-Novel and I was wondering if Light will change his appearance to match his age. I get that he's doing it to remind him of suffering and betrayal at the hands of his former party. But after I saw the first illustration he looks like an 8 year old to me. I just can't take him seriously. Enjoying the story so far.