You can read my recently published short story about Pele's sister Kapo and her amazing abilities in the form of a letter from Emmalani's governess at the Reedsy website (click on the first link below), or here on my website, in the Short Stories section, (click on the second link below). There, below the story, I've posted pages from a textbook on Hawaiian Mythology for context.   Here is an excerpt:  
"These Hawaiians are great athletes, though their sports would terrify our polo players.  Years ago, a great slide or Lua was built down the slopes of Mauna Loa (the Long Mountain) all the way to sea.  Daring boys and girls lay down upon heavy boards and rode many kilometers, picking up speed and once in the ocean, they take to riding the waves. Honestly, Annie, mermaids are a pale and fragile myth compared to these ocean loving natives....At the Talk Story, I learned that their goddess Pele had sisters, one of whom was called Kapo. This goddess had a most unusual talent.  I am struggling to convey what I heard at that meeting in Waipio for it involves a woman’s’ private parts...."  

Naiveté and innocence interweave
         beneath her dark exterior.
And she continues to relate to me the woes of her friends.
 
Doesn’t she realize how beautiful she is?
Long, thick black hair caresses her lithe, athlete’s form.
Pure clear brown eyes pierce my mind
         and something in me cringes.
She must see right through my false identities,
         yet she continues her idle chatter of nothing in particular.
How could this child have been raised so unaware 
         of her own elegant beauty?
To tell her might be to spoil her attractive modesty.
 
She looks down and lowers her eyelids frequently.
She does not take compliments easily.
Shyness becomes her.
 
Sweet lady, she is always being asked to speak up
​and fears her soft voice to be one of the countless faults she curses herself with.
 
I’ll stay with her for now, be her friend for a short period more, but she will outgrow me.
         Soon; I feel it
                  She will come into her own.
But I’ll always remember her as she is now: unspoiled, without conceit, shy and beautiful.