Streber can be sometimes serious when he needs things to be done perfectly, but most of the time, he's really cheerful and whimsical. He is always wiling to do hard work and believes in himself fully. Although, he may be a bit fearful towards a certain topic, that being a traumatic day of a man in a demon costume ripping his arm off brutally. Thankfully he managed to recover and get a new prosthetic arm.