The video previews the character Seyla (Elnowar Seylan, spelling not confirmed), voiced by Shiina Natsukawa.
Namori (Yuruyuri) is the original character designer, and Haruko Iizuka (Sisters of Wellber, Tamayura, Children of the Whales) is adapting the original character designs for animation.
She does not have much common sense, and often goes into other people’s houses to search for items.
The official website for Studio Gokumi’s original television anime Endro~!