Radiated Lines

In manga, sometimes lines are drawn emanating from a character when that character is emanating positive energy. When they're happy, bright, cheerful and so on.

• akarui
  明るい
  Light. Bright.
  Cheerful.

Manga: One Piece (Chapter 9, 〝魔性の女〟)

• Context: Nami ナミ cheers up.
• honto!?
  ほんと！？
  Really!?
• hontou 本当 with the long vowel shortened.

They're drawn sort of like focus lines, but their function is closer to laughter lines.