Vanguards introduced a host of Vanguard Familiars with the Trail of the Saint event. The purpose of Vanguard Familiars is to modernize the kits of older units to make them usable in the current meta.
Julius (Spinning) is a Mythic-rarity unit introduced with Vanguards Trail of the Saint event. He is a summonable character available on the Fall 26 Banner, making him a fairly elusive unit.
The Stands in A Bizarre Run can access alternative Stand Skins that alter their visuals. Stand Skins are cosmetics that can be unlocked using a Shiny Stand Arrow.
Rokakaka Fruits in A Bizarre Run are consumables used to remove your currently-equipped Stand. These can be bought from the shop or picked up during a race, making them fairly easy to get.
Mr President is a special Stand in A Bizarre Run with a focus on defensive utility. Its defensive nature fits it to a tee, since the Stand takes the form of a turtle.