Guide for Magical Battler.
It helps out with information on how to unlock levels of friendship with the NPCs, a map to find them and a Walkthrough.

The 🏡 icon will show where they live.
The 🌞 one will show where to usually find them during the day.
The 🌜 one will show where to usually find them during the night.
The 🛌 icon shows up to let you know that you can sleep in that character's bed after you befriend them (the level may vary on the character).
The 💗 icon shows where you can replay any special interaction.
The 🧭 icon will highlight on the map the general location.

More information