Simplify the following text for a Grade 10 native English-speaking person.
Original: He has since become more caring and protective of Lucy , and is the first person to believe her when she sees Aslan , supporting her against the disbelief of Trumpkin and her other siblings .
Simplified: Edmund has since become more caring for Lucy , and is the first one to believe her when she `` sees '' Aslan , going on her side against the disbelief comments of Trumpkin and her other siblings .