Emerson was party to a three-way deal in January 2019, which saw Betis and Barca each pay half of the €12million fee that was sent to Brazilian club Atletico Mineiro.
At the time it was reported that right-back Emerson would stay with Betis for two-and-a-half years with the view to aiding his adaptation to Spanish football.
It was also claimed upon the completion of the complicated deal that Barca would have to reimburse Betis their initial outlay of €6m plus an additional amount in relation to his value at the time, while the Verdiblancos will be owed a percentage of any future sale.
Barca is said to be paying Betis €9m for the right to finally bring Emerson to Camp Nou, though the deal seemingly represents something of a coup given his performances in LaLiga.
Emerson – who is in the Brazil squad for this month's World Cup qualifiers ahead of the Copa America – has proved to be both a dependable defender and a capable attacking outlet.
His 10 assists over the past two seasons is bettered by only one LaLiga defender (Jesus Navas, 13), while his 62 key passes is the fifth-highest among full-backs.
He has played 170 open-play crosses in that time, a haul bettered by only 10 other right-backs and left-backs, highlighting how he can be expected to offer significant support in attack on the flank.
His forward-thinking nature has not impacted negatively only his defensive output.
Emerson's 853 duels over the past two years is nearly 200 more than any other defender, while his 492 duel wins is also a LaLiga high for players in the backline.
It is a similar story for tackle attempts (165) and tackles won (98), while he also has an impressive tally of 92 interceptions.
This paints a picture of an all-action defender who will work tirelessly up and down the right flank, potentially making him effective competition for Sergino Dest.
Emerson is Barca's third new signing following the acquisitions of Sergio Aguero and Eric Garcia from Manchester City.
Georginio Wijnaldum is expected to join the influx, with his Liverpool contract set to expire.