Quite honestly, it DOES appear rather suspiscious.
Larry Potter in 1987, then "Harry Potter" just came out of thin air??
Although Rowling's Neptune has no aspects that are harsh, there is the matter of her Neptune being in the 17th deg.of Scorpio....which is akin to the South Node (the worse being the 19th deg.)
I do not see any of the so-called, "Lying degrees" in her chart, (critical degrees being 2GEM,13Libra or 11AQU)
so I need to rule that out.......nor is Hades (5GEM) apparently here.
POF in the 2nd surely is potential for riches...in the money house, even with such aspects as the squares & opp.
Her South Node conj. her POf. - so it's a wonder, but she is very wealthy.....you'd think a harshly aspected POF, with the South Node, wouldn't produce such a very wealthy life.,but it has....

must be the tension produced for money (she contemplated suicide when struggling with 3 kids)
When her mother died she would have been 25.
Her 7th house cusp, (the age of 25 ) has no planets, however her Moon (Mother), is a part of a stellium, and as such is at 21 degrees
Virgo which squares her 22nd degree Jupier (8th house )....
During the time her mother died, she had transiting Moon conj. Atropos (cutting the ties that bind), over this natal Jupiter.
Tr.Moon was 28GEM and TR Atropos at 23GEM.over 8th house, effectively "triggering" the Moon square Jupiter in the house of death.
The moon with atropos.
Transiting Moira (4TAU) would have been within 2 degrees of her natal D/C cusp (age 25 in her chart), hence, TR Moira here, did show the fate of the loss at that age for her.