Twin
From MediaWiki
Transformer twins often share a closer connection than other forms of Transformer relatives.
Generation 1 continuity
Sideswipe & Sunstreaker are fraternal twin brothers. Fiction at the time never explored the details of this relationship, or if there was such a thing as identical twins. Later, the More Than Meets The Eye profile books revealed that brothers are formed when a spark that is being introduced to a protoform naturally splits.
Animated continuity
Animated twins
Live-action film series
Two Transformers that are twins have a special relationship to each other. The two are intimately linked. Their relationship is so close, they consider the other to be their other half.
When one twin dies, the other feels a temporary surge of pain, but continues on afterwards by himself.
