8 Reasons Why Grandsanta Is A Festive Version Of Everybody's Grandfather If you love Arthur Christmas, you'll love his Grandsanta too. 1. Grandsanta likes to do things the old fashioned way. 2. No need for a GPS, this retired Santa can navigate with the stars. 3. He has a wealth of wisdom. Some call him a walking encyclopedia. 4. He may not be a doctor, but he will gladly give you a diagnosis. 5. He really understands the youth of today. 6. According to Grandsanta, he is immune to danger because he is the overlord of an annual holiday. 7. He talks about how easy we have it these days and how tough life has been for him. 8. He struggles with names on occasion. Catch up with Grandsanta in Arthur Christmas during Freeform's 25 Days of Christmas!