Trini Kwan is the love interest of Jason Lee Scott and Billy from Mighty Morphin Power Rangers Season 1 and early Season 2.
She is a bit of a tomboy and is also intelligent next to Billy.
She was first seen working out at Ernie's Juice Bar & Gym along with her friends.
She, Jason, Zack, Billy and Kimberly were teleported to the Command Center where they meet Zordon and Zordon selected them as Power Rangers.
After they left, they were attacked by putties.
She activated her power coin and became the first Mighty Morphin Yellow Ranger as she battled the putties. She had only one fear, heights.
She saw Billy in trouble with a tremendous effort. Billy had feeling for trini but she like jason and jason liked her too.
At the Island of Illusion, she had to overcome her fear of heights and she was able to accomplish this.
Trini also like collecting dolls as her favorite one was turned into a monster and she and Billy were trapped.
She was always by Billy's side when Billy works on various devices to defeat Rita Repulsa or Lord Zedd.
She also shows some romantic feelings for Jason which he also had .Later when they went to peace conference they started dating and later they got married.
After Tommy lost his Green Ranger powers and became the White Ranger.
In the end, she, Jason and Zack had to leave Angel Grove to attend the Peace Confrence in Switzerland as she transferred her powers to her successor, Aisha Campbell and left to the Peace Confrence in Switzerland along with Jason and Zack.