Phone

Phone is a call application that can be accessed via the 1st left-sided icon on the homepage screen. It contains the list of calls initiated by the demon brothers, including missed calls when the user is away from the game. New calls are acquired as the story progresses or upon raising intimacy levels with each of the demon brothers.

Phone Call List
Within the phone app under Contacts is where you can find a list of all phone calls for each character, both locked and unlocked. A badge notification will appear next to characters you have missed calls from.

If you have unlocked a call, you can replay the conversation as many times as you want.

Calls can also be replayed from the landing History page.

Starting from level 5 intimacy, every following 5 levels (10, 15..) players get a new call from:

Once reaching intimacy level 40 with a character, players will recieve "daily" calls from them (you don't literally get a new call every day).

Intimacy Level
The intimacy level page is where you can check your current intimacy levels with each character. You can also confirm how much more intimacy points you are needed to increase your level.

The most effective method of raising a character's intimacy level is with positive Surprise Guest interactions, but intimacy can also be raised through Episode Intimacy Bonuses.