Called the Absolutely Safe Express, this name sounds extremely lucky and safe...
Bullshit!
Even if Ruvie is a bona fide genius! Even if he is the Chief Engineer of Sky Pillar Mountain! Even if he developed Cordova, a rune body that can be described as defying the heavens! Even if he has garnered knowledge from more than fifty vehicles...
Still, there are two crucial factors that make Motan hesitant to believe that this thing in front of him is truly safe...
First, Ruvie is a goblin.
Second, he studies engineering.
Countless well-known tragic cases and general knowledge constantly remind us that when the two terms 'goblin' and 'engineer' are combined, under the mysterious influence much like the will of the universe, a chemical reaction seems to occur, causing the final outcome to often be—BOOM, BOOM, or BOOOOOOM!!!
If engineering can be equated to 'may malfunction', then goblin+engineer can pretty much be synonymous with 'will definitely explode'.