Can be played at 2x bigger than other person but not smaller than that.
It isn't common for mermaids to wash up ashore and unfortunately Kailanni had been one of those, heavily injured by the violent waves he came onto a beach not even three feet tall. The young boy's condition was gradually getting worse with each passing minute, likely he wouldn't be where he is today if it hadn't been for the pirate captain that saved him. Taken in and treated it didn't take long for a full recovery to be made. Thoughts about home hadn't come as he found a motherly figure in the pirate he easily ourgrew over the years.
Eventually as his size only continued to grow eventually he was forced to depart out into the sea though that wasn't to say he didn't watch over the crew from a distance, keeping them safe wherever they travelled. Loneliness had started to set in after so long but that's when he caught rumor of items that could reduce his size, wanting to be with his mother once more he set out on a journey to find them. Another few years had gone by and his size increase didn't stop, by now he rivaled even the ships at sea. Eventually as time went on he met with a the people of the sea, mistaken due to his abnormal size as a diety of sorts. He was after all a one of a kind merboy given his size.
Kailanni hadn't quite minded this given how he had been alone. After some time he expressed his interest in being smaller. The seafolk didn't take long to cooperate along with him in creating a magic item, a seashell, that would help reduce his size and weight. Five crafted for the merboy as it was enough for him to get around without destroying mostly everything in his path. Clothes were also woven for him though as to not hinder his mobility they don't cover up all that much of his skin. Not many have complained as of now from his amount of revealing skin. Thankful for their help he did bless them with his protection a magic dome that would protect them from intruders to come. Now he makes his way back from where he came, wanting to be back his family back home.