Vutha the Female Lawful Evil Dark Desert Kobold Totemist 2 / Scout 3 / Rogue 14
Spoiler: Background
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Vutha looked up as a bell rang twice in the Hatchery, signalling that a group of adventurers had entered the false den that the All-watcher had set up together with the Sorcerers and trapcrafters, when establishing the mine a century past. Vutha made sure that the other fosterers took over for her duties and she entered the tiny tunnel that led from the Hatchery to a hidden hatch just below the ceiling in the fake hatchery getting ready to attack the intruders when they arrived.

The All-watcher had long since learned that the gear that could be taken off of Adventurers fetched a pretty price and might even be worth more than regular mining, their Den had cleaverly hidden tunnels, to small for humans, to four different locations in the surrounding area which were used to lure in Adventurers, and in the remote case that the entries to those tunnels were to be discovered it was Vutha's duty to make sure that the knowledge weren't spread. Preferably by making sure that there were noone alive to spread it.

Spoiler: Stats
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Ability Base Racial Mod Total
Strength 10 -4 6
Dexterity 18 +2 20
Constitution 12 12
Intelligence 14 14
Wisdom 12 -2 10
Charisma 8 8
all Ability score increases are to be placed in Dexterity

Spoiler: Build
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Level Class Base Attack Bonus Fort Save Ref Save Will Save Skills Feats Class Features
1st Rogue 1 +0 +0 +2 +0 Bluff 4, Climb 4, Hide 4, Jump 4, Listen 4, Move Silently 4, Search 4, Spot 4, Tumble 4, Use Magic Device 4 Dragon Tail Sneak Attack +1d6, Mimic 1/day
2nd Rogue 2 +1 +0 +3 +0 Bluff 5, Climb 5, Hide 5, Jump 5, Listen 5, Move Silently 5, Search 5, Spot 5, Tumble 5, Use Magic Device 5 Evasion
3rd Rogue 3 +2 +1 +3 +1 Bluff 6, Climb 6, Disguise 4, Hide 6, Move Silently 6, Search 6, Use Magic Device 6 Weapon Finesse Sneak Attack +2d6, Penetrating Strike, Draconic Rite of Passage (Persistent Blade)
4th Rogue 4 +3 +1 +4 +1 Bluff 7, Climb 7, Disable Device 1, Disguise 7, Hide 7, Move Silently 7, Seach 7, Use Magic Device 7 Disruptive Attack
5th Totemist 1 +3 +3 +6 +1 Listen 7, Spot 7, Tumble 7 Wild Empathy, Skilled City-Dweller ACF
6th Totemist 2 +4 +4 +7 +1 Listen 9, Spot 9, Tumble 9 Open Least Chakra (Hands) Totem Chakra Bind
7th Scout 1 +4 +4 +9 +1 Climb 10, Hide 10, Listen 10, Move Silently 8, Spot 10, Tumble 10 Skirmish +1d6, Trapfinding
8th Scout 2 +5 +4 +10 +1 Hide 11, Listen 11, Move Silently 11, Search 10, Spot 11, Tumble 11 Battle Fortitude +1, Uncanny Dodge
9th Scout 3 +6 +5 +10 +2 Disable Device 4, Hide 12, Listen 12, Move Silently 12, Search 12, Spot 12, Tumble 12 Swift Ambusher Skirmish (+1d6, +1AC) (+2d6, +2AC), Dungeon Specialist, Trackless Step
10th Rogue 5 +6 +5 +10 +2 Bluff 10, Disable Device 5, Hide 13, Listen 13, Move Silently 13, Search 13, Spot 13, Tumble 13 Sneak Attack +3d6
11th Rogue 6 +7 +6 +11 +3 Hide 14, Listen 14, Move Silently 14, Search 14, Spot 14, Tumble 14, Use Magic Device 11 Mimic 2/day, Skirmish (+3d6, +2AC)
12th Rogue 7 +8 +6 +11 +3 Hide 15, Listen 15, Move Silently 15, Search 15, Spot 15, Tumble 15, Use Magic Device 15 Darkstalker Sneak Attack +4d6
13th Rogue 8 +9 +6 +12 +3 Disable Device 8, Hide 16, Listen 16, Move Silently 16, Search 16, Spot 16, Tumble 16, Use Magic Device 16 Improved Uncanny Dodge, Skirmish (+3d6, +3AC)
14th Rogue 9 +9 +7 +12 +4 Disable Device 11, Hide 17, Listen 17, Move Silently 17, Search 17, Spot 17, Tumble 17, Use Magic Device 17 Sneak Attack +5d6, Mimic 3/Day
15th Rogue 10 +10 +7 +13 +4 Disable Device 14, Hide 18, Listen 18, Move Silently 18, Search 18, Spot 18, Tumble 18, Use Magic Device 18 Multiattack, Draconic ReservoirB Special Ability [Bonus Feat], Skirmish (+4d6, +3AC)
16th Rogue 11 +11 +7 +13 +4 Disable Device 17, Hide 19, Listen 19, Move Silently 19, Search 19, Spot 19, Tumble 19, Use Magic Device 19 Sneak Attack +6d6
17th Rogue 12 +12 +8 +14 +5 Disable Device 20, Hide 20, Listen 20, Move Silently 20, Search 20, Spot 20, Tumble 20, Use Magic Device 20 Mimic 4/day, Skirmish (+4d6, +4AC)
18th Rogue 13 +12 +8 +14 +5 Disable Device 21, Disguise 9, Hide 21, Listen 21, Move Silently 21, Search 21, Spot 21, Tumble 21, Use Magic Device 21 Improved Skirmish Special Ability [Skill Mastery: Hide, Move Silently, Tumble], Sneak Attack +7d6
19th Rogue 14 +13 +8 +15 +5 Disable Device 22, Disguise 11, Hide 22, Listen 22, Move Silently 22, Search 22, Spot 22, Tumble 22, Use Magic Device 22 Skirmish (+5d6, +4AC)

Spoiler: Meldshaping
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Level Soulmelds Essentia Chakra Binds
5th 2 1 0
6th 3 2 1

Going by the ruling that Open ** Chakra gives a extra Chakra bind, and my default Soulmelds are as such:
Soulmeld Type Placement Effect
Sphinx Claws Bound Hands +1 on Strength Checks and Skill Checks; Pounce with Natural Weapons
Lamia Belt Bound Totem +4 Competence on Bluff and Hide Checks (+2/Essentia); 2 Claws (1d3)
Wormtail Belt Shaped Waist +2 Enhancement to Natural Armor (+1/Essentia)

Spoiler: Character Notes
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At the end I'll have these natural weapons

1 Tail (1d4)
4 Claws (1d3)
1 Bite (1d2)

And additionally a Horned Helm (MiC p112) would do nicely giving me a Natural Gore attack (1d8),

My two key points is my Tumble and my Hide checks, both of which i'd be able to take 10 with.

Tumble:
10 (Take 10)
2 (Synergy from Jump)
7 (Dex Modifier)
22 (Skill Points)

Ending up beating a DC 40 before adding even the tiniest item adding Dex or skill bonus, this would make me able to make 10ft steps triggering Skirmish when charging aren't viable. (DC 40 for 10ft step is in Oriental Adventures)

The other key point is my Hide check which together with my Hide in Plain Sight (Dark Template) and Darkstalker makes it quite easy to Sneak Attack.

Hide:
10 (Take 10)
7 (Dex Modifier)
8 (Size Modifier, Kobolds get Slight build, so whenever its preferable i can count as tiny)
8 (Racial, Dark Template)
4 (Lamia Belt)
22 (Skill Points)
-20 (Hide while Attacking)
= 39 Spot check to negate my Sneak Attack, before items or Essentia to Lamia belt, adding up.

Spoiler: Sources
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Source Items Used
Cityscape Web Enhancemnet Skilled City-Dweller
Complete Scoundrel Improved Skirmish, Swift Ambusher
Dungeonscape Penetrating Strike (Rogue ACF)
Exemplars of Evil Mimic (Rogue ACF)
Lords of Madness Darkstalker
Magic of Incarnum Totemist
Monster Manual Multiattack
Players Handbook 2 Dungeon Specialist (Scout ACF), Disruptive Attack (Rogue ACF)
Races of the Dragon Dragon Tail, Draconic Rite of Passage, 'Baseline' Kobold
Races of the Dragon Web Enhancement Variant Kobold Traits, Draconic Reservoir
Spell Compendium Persistant Blade
Tome of Magic Dark Template
Unearthed Arcana Desert Kobold variant