How can a character become a band member?

[Lily_Mu]

That.

[Rich T.]

Go to the shop, where you can change the appearance and name of all four of your band members using pieces from all the characters you unlock in story mode.

[Lily_Mu]

I mean, when you choose the band you wanna play in, you get the char screen. In it, there's MY BAND MEMBERS and MY CHARACTERS. What if I want one of those in my band?

[SonicRocker15X]

I think in LRB they literally have to be signed in as playing in the band when the band is made.

[MonkeyGoneToHeaven]

through hard work and a good audition

[hawkofva]

You can't set your characters as stand-ins. They only appear as part of the band when someone is playing as that character.

If you want them to appear in the band, you must change the default stand-ins to look like your characters.

[Awesome_Tree]

through hard work and a good audition

And they can't be an octopus.

[master2uall]

And they can't be an octopus.

That is racist, you bastard! He eheheheeh, just kidding.

[lotr rocks 0]

And they can't be an octopus.

or a snake.

[LuigiHann]

You'll just have to edit the default stand-ins into your friend's characters. It should only take a minute, since the options aren't that complicated, and once one character buys a part, any character in that band can use it.