Although Aslan was more of an immediate presence to Narnia than the
Emperor, he and his father worked in perfect unity. The Emperor was
often referred to as "Aslan's great Father, the Emperor-over-the-sea"
and other such titles. He was greatly respected by his son and all who
honoured the Lion. [Wikipedia]
I do feel not the the charge of deism can be sustained. The following are examples of Aslan's interventions, that I have scoured from cobwebs and Wikipedia. Surely Aslan's interventions are akin to Christ's miracles.
- In the Silver Chair Aslan calls Eustace and then catches him as he falls of the cliff and then blows him to safety and destiny. Aslan also blows Jill all the way to Narnia.
- In the Last Battle Aslan creates the gate.
Wikipedia further suggests:
Narnia, as they knew it, is no more, as 1,300 years have passed and their castle is in ruins, while all Narnians have retreated so far within themselves that only Aslan's magic can wake them.
The Silver Chair
Aslan appears and congratulates Eustace and Jill on achieving their goal, then returns them to the stream in his country where Jill first met him. The body of King Caspian appears in the stream, and Aslan instructs Eustace to drive a thorn into the lion's paw. Eustace obeys, and Aslan's blood flows over the dead King, who is revived and returned to youth. Aslan allows Caspian to accompany Eustace and Jill back to their own world for a brief time, where they drive off the bullies before Caspian returns to Aslan's Country.
The Magician's Nephew
Aslan transforms the cabbie's horse into a winged horse named Fledge, and Digory and Polly fly on him to a distant garden high in the mountains.
The Lion, the Witch and the Wardrobe
Aslan kills the Witch. Aslan breathes life into those she has turned to stone on the battlefield.
Surely arguing deism in the Chronicles is akin to arguing deism in the New Testament?