Vi

In the Netflix Series “Arcane,” Vi is the older sister of Jinx. Vi took on the role of protecting and caring for Jinx as they venture through the depths of Zaun, the undercity of Piltover. Her League of Legends counterpart, Vi, is part of the Wardens, the caretakers of peace in Zaun.
Jinx

Jinx slowly grows up into a shy young kid, and eventually, into someone that players of the League of Legends know. Vi calls her Powder, and she’s a younger sister that Vi protects. But this is not the case for their relationship in the League of Legends because Vi doesn’t have memories of her childhood.
Ekko

Ekko’s curiosity stayed the same with his League of Legends counterpart and his character in the Arcane series. He still messes with equipment turning them into weapons. In the League of Legends, his invention of the Z-Drive proves that he’s one genius boy in the making.
Singed

Another creator, Singed, is part of the Arcane series. Like a villain, Singed tries to create a potion that enhances the physical attributes of the one who drank. He can also craft poisons when it’s needed. His counterpart is the same, but he looks like a resurrected mummy.
Caitlyn

Someone born with a golden spoon, Caitlyn is the daughter of one of the Aristocrats in the Arcane series. Caitlyn is known as a Sheriff in Piltover with Vi for her appearance in the LoL.
Jayce

Jayce works as an inventor and proves his legacy as someone with numerous creations. But in his LoL counterpart, instead of equipment and research papers, Jayce holds a colossal hammer that can turn into a cannon.
Heimerdinger

The dean of Piltover Academy and a yordle scientist is Heimerdinger. A yordle is a race of spirits that embodies mammals. He is known as a Revered Inventor and an eccentric scientist for his LoL character.
Viktor

Viktor grew up in the undercity Zaun, as his storyline in the Arcane series. With his perseverance, he proved himself worthy of being an assistant of the Piltover Academy’s Dean, Heimerdinger. Viktor is a fan of humans and technology in one body for his counterpart. He is the creator of Blitzcrank.
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References:
https://www.oneesports.gg/league-of-legends/league-of-legends-champions-arcane/