Lucas Nickle and Tiffany Nickle's grandmother is commonly referred to as Mommo.There is a problem with parsing the infobox
Personality
Lucas' grandmother is very hyperactive and believes that aliens will invade earth, revealing her slight insanity. She is however a caring grandmother who fights for her grandson's life when the ants take her grandson. She is also very ditsy.
Appearance
Lucas' grandmother is a heavy, short woman. She usually dresses in sweats with aliens patterned on her clothes. She also has grey hair and wears dentures.