The Starred Alien version of Le'boin. She attacks by shooting fire out of her trunk. She deals massive damage, almost as much as Spacefish Jones, but has less than half its range. She also has one of the strongest barriers in the game, having a limit break of 40,000 damage.
Unless you have a Barrier Breaker, Le'Solar can be a difficult enemy to overcome. You need a strong anti-Alien cat or a heavy-hitting cat such as Awakened Bahamut Cat to just destroy its Barrier. Once that's over, you can handle it like a normal Le'boin. If you don't have Awakened Bahamut Cat, you can use Crazed Bahamut, which outranges Le'Solar.
There are several cats that can be used to break Le'Solar's Barrier regardless of the restrictions:
Special Cats: Any form of Bahamut Cat works well. However, Crazed Bahamut will require constant meatshielding to make sure Le'Solar doesn't get close enough to hit him, and Awakened Bahamut requires careful timing so that he doesn't waste his attack on an enemy in front of Le'Solar. If you don't wish to expend a Bahamut on Le'Solar, Loincloth Cat or Lil macho legs will smash the Barrier in two... with luck.