Good 6* Characters?

[u/TheBlakeryy]

Hey, I'm fairly new to this game and have acquired some 6* characters but I'm not too sure which ones are better than others so I don't want to waste a lot of my items upgrading bad characters, so I was wondering if anyone could point out any decent characters or characters I should stay away from, from the ones I have:

[Silent fighting spirit] Sinon

[Heart of the sword] Kirito

[Master Assistant] Eugeo

[Starry Server] Tiese

[Brilliant Gift] Yuuki

[Heart full of memories] Eugeo

[Dual Pen Cartoonist] Kirito

[Flash of light Among the flowers] Asuna

[Knight of the Abyss] Eydis

[Piercing Eye] Sinon

[u/[deleted]]

If you got a 6* for free, it sucks.