Beru

a humanoid ant with black scales and a purple body inside along with its glowing eyes

He is extremely fast and intelligent, his ability is that whatever he devours he has access to the abilities and memories of the being he devours.

Absolute Loyalty – Beru is extremely loyal to Jin-Woo and always refers to him with great respect, calling him "My Lord". He follows all orders without question and always seeks to please his master.

Respect and Etiquette – Unlike its original version as a magic ant, Beru demonstrates refined and polite behavior, often speaking formally and even trying to act more nobly.

Fierce in Combat – Despite his loyal and sometimes even comical personality, Beru remains an incredibly brutal and ruthless warrior in battle. He enjoys crushing Jin-Woo's enemies with extreme efficiency.

Competitiveness and Pride – He takes a certain pride in being one of the strongest soldiers in the shadow army and seems to enjoy demonstrating his strength.

Unintentional Humor – Some of Beru's actions end up being funny, such as his exaggerated way of flattering Jin-Woo or his disastrous attempt to sing to a baby. This makes him a charismatic character and beloved by fans.

When Beru is in the normal world and at his master's house, he watches various Doramas to pass the time; however, when he is in the shadow realm, he trains and leads his ant sisters.