Ok, to answer the questions as simply as I can, Serp is right in that the Rail cannon is basically a giant sniper rifle. You need a spotter to provide coordinates, otherwise your chances of hitting are like, one in ten. You can fire at targets on your radar, but since you have literally no information about their actual surroundings other than the rough distance and their direction, it's unlikely that you'll hit them. Besides, the radar only has a limited range, and that range is far lower than the Rail-cannons maximum range, so to use the rail cannon to its full effectiveness you need to have somebody feeding you information. Once you have the coordinates, hitting the target is actually pretty easy; you have a 60% chance of hitting them, but every round increases that chance by 5% as you adjust your bearings and you get new information, to a maximum of 75%. Now, if it hits you directly, unless you're a Heavy, you're probably fucked. If it lands next to you...well, you take a giant non-explosive shell, speed it up to several thousand mph and launch it directly into the ground and see how big a crater and how big a shockwave it makes. Though it might not necessarily damage you, it would at least knock you off of your feet. As Serp also noted, a Scout or Assault is much harder to hit, so the percentages would be slightly lower for them. Artillery shells are just big whopping explosive shells that don't have to hit directly to damage you, but they do notably less damage than a Rail Cannon.
Ok, so, onto the bio:
- "to chief advisor of present emperor of The Zhu Dynasty."
I'd rather avoid having the illegitimate son of the Emperor of the Zhu Dynasty
in the game. He can be the bastard son of a prominent political figure, sure, but the Emperor? Yeah, way too high. It gives your character significantly more clout than anybody else, and throws a whole mess of problems into the mix that I'd rather not deal with.
- What I mentioned about his age when starting.
- "Naturally that company provides all advanced hardware for his first mech which has advanced energy systems and electronics. Thanks advanced energy core he could mount one rare (and sold used) military used rail cannons mounted for his mech."
Whilst a nice bit of fluff, just bear in mind that functionally, his equipment is the same standard as everybody elses starting stuff.
- "nor he has never honestly lost a match to anyone expect against his mentor few times which he holds high regard."
I thought you said he only ever played simulations? And he's never
lost? Again, that sounds a bit too much like "he's really awesome no really you guys." Did he never lose because he's that good, or because people were worried about beating him since he's the son of somebody important? Maybe tone that down a little, it's starting to sound a bit...well, a bit "He's just awesomer than all of you."
- Mech Armaments:
Please organise them into a list for easier reading rather than a block paragraph.
Just bear in mind that your Mech isn't able to move that quickly, probably isn't that much larger than the Assaults, and that for your communication and radar array, you will need some part of it jutting out; Radar works on sound waves that bounce back from things, so you need an external source and receiver. Likewise, your communications array will need to have some part outside of the Mech to give it the best possible quality.
That's what I can see at the moment, so if you fix those, then you should be good for the time being.