Who am I? Sonic edition

[Skye Prower 386]

Need to come up with a difficult one.... I don't think this is it, but given the 'last post' topic and time travel:

I travelled in time to change the past, but I am not a Hedgehog. Who am I?

[Geoffrey St John 175]

Lara Su

[Skye Prower 386]

Huh, okay. That wasn't who I was thinking of, but yes she fits the clue. Erm, oops.

[Geoffrey St John 175]

If it wasn't Lara Such then the only other possibility it could be in Knuckles.

[Skye Prower 386]

That's the one. Erm, bonus points I guess for beating the question twice?

[Geoffrey St John 175]

I guess I am just that good lol.

I am someone who is good with tech and has worked in secret with two old scientists against my leader's wishes.

[Princess Blaze 347]

Would that be NICOLE?

[Geoffrey St John 175]

No it isn't Nicole.

[MetalSkulkBane_PL 18]

Hmm, I could use another hint.

[Geoffrey St John 175]

The age of the character in question takes a large leap between the two old scientists.

[MetalSkulkBane_PL 18]

I think it's Tails but I'm not sure about situation. Mobius X Years Later?

[Geoffrey St John 175]

No it isn't Tails.

[Princess Blaze 347]

I'm going to take a wild guess that's probably wrong and say Skye

[Geoffrey St John 175]

It is indeed incorrect so keep guessing people.

[MetalSkulkBane_PL 18]

OK then, I have no idea whatsover who could it be. Another hint would be welcome and not to be cheeky, but considering there is only one ancient scientist (Dimitri) and four child prodigies (Tails, Miles, Hope and Marine) if riddle says "three guys, two of them old worked together" than a hint stating "third guy was in fact younger that old guys" isnt very helpful.

[Geoffrey St John 175]

The character has been in it since the very start.

[MetalSkulkBane_PL 18]

That makes me think its Rotor, which I suspected but I dont remember any workings with 2 old scientists, thought I suspect Uncle Chuck is one of them.

[Geoffrey St John 175]

Yes the answer is Rotor. As you said he worked with Chuck in present time but in 30 years later which is a large age gap for him. Rotor worked with the old scientist Cobar. Do you see the sense in my clues now?

[MetalSkulkBane_PL 18]

Oh, I kinda thought he worked with them AT THE SAME TIME. Now it makes sense after re-reading.

OK now somethink different: Hamlin is the only named/important/known pig in comic and his buddy Dylan is the only known porcupine. Now name 2 female characters that are only known members of their species (list is actually really short...) and know each other well.

[Geoffrey St John 175]

That is quite a tough question but it is my belief youare talking about Barby Koala and Erma Ermine.

[MetalSkulkBane_PL 18]

No, there are Koala from Sol Dimension, they're named in games.

[Geoffrey St John 175]

Then if Barby is out I will have to go for Selia seal in her place with Erma Ermine.

[MetalSkulkBane_PL 18]

Yes, its them.

[Geoffrey St John 175]

That was quite fun but I have decided to pass my turn over to Princess Blaze.

[Princess Blaze 347]

Hmmm, I'm not very good at coming up with hard questions for this, so I'm passing my turn back to Geoffrey.