Male OC x Android 21

The Saiyan Elites

We reached the area, and what I saw shocked me.  Piccolo was dead on the ground, Krillin was knocked out near the cliff, and Gohan was trying desperately to avoid the big Saiyan's attacks, while the other one watched.  I was pissed.  Amy flew down and grabbed Gohan out of the way, while I kneed the big guy in the face.  Goku and the other Saiyan flew off to fight somewhere else.  I'd join him after I took care of this one.

???: Another Earthling, eh?

Leek: No... I'm a Saiyan, like you.  But that's not important.  What is important, is that you're going to get what you deserve.

???: Fine, I'll let you join your friends.  But first, I'll introduce myself.  I am Nappa, a Saiyan elite.  And you... will watch the boy die.

He turned quickly and shot a blast at Gohan.  I yelled and flew towards him, but I couldn't reach him in time.  Amy jumped in front of Gohan.  There was a huge cloud of smoke, and when it cleared, Amy was laying motionless in Gohan's arms.  I went over to her side, and put my hand on her neck, but there was no pulse.  No...

Nappa: Be thankful.  She had a quick death, but she died in vain.  This time, nothing's gonna save that brat.

That sent me over the edge.

Leek: You... you monster.  You killed her... and now...

I could feel immense strength flowing out from within me.  I stood up and turned to him, filled with pure rage.

Leek: You are going... TO PAY!

There was a blinding flash of green light, and an explosion of energy, pushing Nappa back.  When the dust cleared, I was standing in a crater, with a green aura flaring around me, and my hair turned bright green.  I glared at Nappa, who backed away, visibly scared.

Nappa: It can't be... the legend says it only happens every one thousand years... and YOU are the Legendary Super Saiyan?

Legendary Super Saiyan?  What is that?  Whatever, it doesn't matter.  What matters is that he's going to die.

Leek: Gohan... take Krillin.  Give him a senzu, take Amethyst's body, and get as far away from here as you can...

Gohan: Uncle Leek?  But... Amethyst is breathing again.

Leek: Wh-what?

I turned around, and sure enough, Amy was coughing, and trying to stand.  She looked up at me weakly.

Amy: L-Leek?  What's happening?

Leek: Get out of here, all of you.  I'm finishing this.

I turned back to Nappa, who sneered at me.

Nappa: I see... so you've only powered up.  You're still no match for m-

He was cut off as I appeared in front of him.

Leek: You're wide open.

I pulled back my fist and punched him with all of my strength.  He went flying in the direction that Goku and the other Saiyan went.  I flew after him as he impacted the ground, right between them.

Goku: What the-

Nappa: Ve-Vegeta... Help...

Vegeta looked at him in disdain, raised his hand, and obliterated Nappa with an energy blast, shocking both Goku and I.  Vegeta looked up towards me, and smirked.

Vegeta: Interesting.  I've never seen a Saiyan with green hair before.  What, did you dye it?

He started laughing, but Goku cut him off by asking me the obvious question.

Goku: Leek, why is your hair green?

Leek: I'm not sure.  Maybe if Vegeta hadn't killed him, Nappa could've told him the same thing he told me.

Vegeta looked confused.  But what I said next seemed to terrify him.

Leek: Nappa talked about a legend.  Something that happens only once every thousand years... and I think he was right.  My name is Leek, a Saiyan raised on Earth... and I am the LEGENDARY SUPER SAIYAN!