

You'll likely need to level and upgrade more characters outside your favorite team.

It certainly would be a waste to have a large selection of characters (most obtained from gacha) and not have an incentive to cycle through more than the required four. That way, you can make full preparations before going in, assembling your best team depending on the content you're taking on. So you're required to form your teams based on the enemy level and recommended elements before transitioning inside the Memory. The Memory layout also appears to be borrowed from Genshin Impact and includes completion objectives similar to Honkai Impact 3.
