They are one favorite bromance because they have been there for each other through the whole Barry becoming the flash to Cisco becoming Vibe to the whole flashpoint it took a while for Cisco to forgive Barry for alternating the timeline. Cisco and his codenames for metas and Barry agreeing with him and finding out that Harrison Wells is actually Eobard Thawne and trying to figure out a way to stop him and just their friendship in general.
