Remember the mice came and bit of the rope then the stone table cracked.
Lucy and Susan were unable to untie Aslan because the ropes used to bind him were special and magical, requiring someone with a deeper understanding of magic to untie them. The girls did not possess this knowledge or ability, which prevented them from freeing Aslan.
Lucy and Susan cannot untie Aslan because the magic involved in the ties is too powerful for them to break. The ties are part of a deeper magic and can only be broken by someone who is willing to sacrifice their own life in exchange for Aslan's.
The White Witch is fighting Aslan when Lucy and Susan arrive. She is trying to prevent Aslan from reclaiming his rightful place as the true ruler of Narnia.
Susan, Peter, Edmund, Lucy, Aslan
Lucy and Susan couldn't untie the ropes on Asian because they were tied too tightly or perhaps they lacked the proper tools or knowledge to untie them. It's also possible that Asian was resisting their attempts to be untied, complicating the situation further.
After Aslan revives, Lucy and Susan fight alongside Peter and Edmund in the battle against the White Witch. They help to defeat the White Witch and restore peace to Narnia.
Aslan asked Susan and Lucy to walk beside him and be brave as they followed him to the Stone Table, where he would face his fate. He requested them to be close to him and not look back.
They are to be symbolic of the women who were at the tomb when Christ was resurrected from the dead.
susan and lucy
Edmon, Lucy, peter, Susan, aslan the lion and prince Caspian
Peter and Susan didn't believe Lucy because they thought Lucy was making up stories, Lucy had been sleeping and dreaming, and they couldn't see Aslan.
Aslan, Susan, and Lucy lead an army to battle against the White Witch at the Battle of Beruna. Aslan ultimately defeats the White Witch and restores peace to Narnia. Afterward, they are crowned as kings and queens of Narnia.
Aslan tells Lucy lots of things.