your pso character bio!!

[K_I_R_E_E_K]

I've heard that it could only be obtain in multiplayer, Ultimate, Episode 2, and defeating Olga Flow with a "red weapon".

That's to see flowen after the batle, not to get the item.

Same happens to rico with a dark weapon, however by legit gameplay any dark weapon is impossible to obtain, therefore you won't see rico.

Schthack server provides 1 quest to win the red ring, under certain conditions (wich you will need to ask there) you will receive the ring as a prize.
The olga flow dna is impossible because it is defined by the client (your game), but schthack found something interesting, they could place the item manually (not as a boss drop), with that, the drop rate is the same 1/80 i believe and acts like a boss drop.
They tried to do this on dark falz, but they can't make the item apear at a certain location.

Basicly it's this.
Red ring and olga flow DNA are impossible to obtain offline.
Red ring and olga flow DNA are possible to obtain online, one as a quest prize, another as a set drop.

By sega legit standarts both items are illegit, as a schthack server standart, it's legit.
Now make you're choice.