I wasn't saying she was copied. I was saying she was sort of unique, she took an existing concept, Lulu, took part of it, Pix, and expanded on and made it it's own thing.
Yuumi is in essence, a playable Champion pet. That is a unique thing, Her Q following her uses entirely new tech that Rito has been developing for a long while, and they implemented it to essentially give her Pix's Auto passive as a skill.
Giving an established reason why she can do what she can. While also giving Pix some cool reasons for his own.
Why can he attach like that? It's a skill familiars have.
Why can he shield? He stores energy from his autos.
Why can he give a speed boost? He's using part of his healing spell.
Why does Lulu's ult heal and change size? Lulu is modifying the size to increase max health via transmogrification, Pix is using his healing spell's other part. This makes me love Lulu and Pix more because now I know that they work together for their ult. That's really cool.
I love her and the implications on how Pix works. It also shows a difference between her and him, he is able to split spells apart and use them in a more refined way. Whereas Yuumi uses her skills as more of a raw power kind of feel fitting her subtly selfish nature and undisciplined personality. When she gains shield power, she can't store it like Pix can. When she casts her heal she also uses the movement part.
League has 140+ champs, everything is copied from somewhere at this point. And that's fine. Especially when it creates a theme between characters.
Like how Eve and Tahm both mark character, and marked characters can be affected by their demon powers. I'm hoping they carry that over to Nocturne in his rework.
Or how Lissandra, Sejuani and Ashe the 3 queens of Freljord all have a massive stun for an ult. They're all fight changing abilities but they change the fight reflective of how the girls wish to lead the Freljord. Ashe is a global skill shot, showing her foresight, and her willingness to help those even when it's not personally immediately beneficial. Sejuani is a slow lumbering skill shot with shorter range, that has a heavy aoe affect, showing her raging and bloodthirsty leadership, she puts down those who object. Lissandra is instant and targetted, she acts swiftly with an ironfist, but she also knows not everything can be solved that way, so she might use it for defense instead.