Pixel, Maid of Mechanics
I got this idea from an o l d game I used to play soooo many years ago. (PSO)
Pixel is basically a Mech-Maid type Marksman champion would I thought it would be interesting to make possible for ad carry AND support/tank roles. She wields double mech guns, similar to Lucian's weapons, only they're smaller and shoot lasers and I think his shoots light? I could be wrong.
Passive: "Heat Sensor" - Pixel can detect stealthed enemies and traps/hazards up to a range of 500 away from her using true sight. This ability does not work on wards, however, and the true sight is offered only to Pixel, not her team mates.
Q: "Pulse Fire" - Pixel releases a pulse from her Double Mech-Guns; the blast hits and damages all enemies in it's path. All enemies struck by the attack are marked with the "Target Acquired" debuff and Pixel's next basic attack on those targets deals bonus damage.
W: "Parabolic Trap" - Pixel sets a trap in a target location. Once the trap has been set, Pixel can 'click' the trap to choose whether or not the trap is visible or stealthed. The trap floats in mid-air, so it can only be triggered by enemy champions. Enemy champions struck with the trap while it is visible are stunned briefly and silenced, while enemy champions struck with the trap while it is stealthed are only slowed for a few seconds.
E: "Ultimate Weapon" (Passive) - Pixels auto-attacks increase in damage by 4/5/6/7% of her bonus health. (Ex. She buys Randuin's Omen, 500 health, she gets 20 AD if the ability is level 1, and 35 AD if it is level 4.)
R: "Electric Tether" - Pixel links herself using a tether of mechanized electricity to an enemy champion. The link does damage over time, and continually charges a barrier equal to 25% of the damage done by it as long as it is connected. Pixel can then use her auto attacks to attach the tether to other enemy champions, increasing her barrier growth. All enemy champions stuck in the tether by the time it ends (5/6/7 seconds) are stunned.