You probably already know your Sun's sign and with a chart you can now see its House position. Your Sun may be alone or in a cluster with other planets. The Sun in astrology is your core self, and its House position and relationship to other planets can be very revealing.
Harry's Sun is in Leo and aligned with the Ascendant, putting it in both the 1st and 12th Houses. It's hard not to notice that Mercury is also smack dab at the horizon, and Jupiter and Venus are close by.
With the Sun straddling the 1st and 12th Houses and aligned with Mercury, it follows that Harry is a magician and leader. The 12th House is that of mysteries and unseen worlds and a strong 1st House Sun can give someone a forceful presence. His Sun in both houses gives him one foot firmly planted in both the real and magical worlds.