Not sure which announcer you are referring to but in the first match between KGC vs GS from KBSN Sports, the male announcer is Lee Ho-Guen and the female announcer is Lee Sook-Ja (former NT Setter). In the final between KGC vs GS, Lee Ho-Geun and Lee Sook-Ja was calling the match alongside KGC #12 Han Song-Yi older sister Han Yoo-Mi (former NT OH). FYI the ref name is Jeon Young-A.
(L=>R: Han Song-Yi, most likely her Mom & Dad, and older sister Han Yoo-Mi)
Also wongz2 on instagram has some fancams of the three announcers in action in the final.
GS #6 Setter Lee Go-Eun got traded from IBK to the GS only like two months ago. She has experience with the NT at 2017 World Grand Champions Cup, 2017 World Championship Asian Qualifiers and 2016 AVC Cup. She does okay most of the time, but I can't really say a lot as I'm not very good at judging how well a setter is performing.
GS #8 OH Park Min-Ji was drafted as a training player (she was drafted after the first 3 rounds, not sure what the difference is with a normal drafted player) and was an unused sub all of last season. When you consider this KOVO Cup is her very first time playing, you have to say she did quite well in attack.
GS #1 OH Lee So-Young for me is the key player that would decide how well GS perform at KOVO Cup. So-Young was GS top scorer in the 2016/17 season (8th overall - only behind five foreign players, Lee Jae-Yeong and Park Jeong-Ah). However she suffered a knee injury during training with the NT just before the start of 2017 WGP. Because of this she missed the majority of last season and only started to play toward the end. She was in the NT for 2015 World Cup and she also took part in the 2016 Olympic qualifications tournament but missed the cut for Rio. Lee So-Young was the top scorer at this year KOVO cup and was the MIP. If only So-Young had played better in the final like she did in their first match then GS might have won KOVO Cup.
KGC doesn't have any player missing due to the the NT this year. They do however have Alaina Bergsma (US, OPP) returning for a third seasons. Alaina has been the overall top points scorer in the league for the past two seasons (2016/17 season: 854pts, and 2017/18 season: 864 pts). For the past two seasons she has basically been carrying the team, they are so heavily reliant on Alaina that she scores nearly 50% of all the points KGC scores (excl. errors from opposing team). So If #11. Choi Eun-Ji can help Alaina with the scoring this season it would be massive for KGC as it would ease Alaina's workload.
I'm not sure which player will get bench when Alaina come back into the team but since Alaina does not received then I think it might be KGC #12 Han Song-Yi but another option is to replaced KGC #14 MB Yoo Hee-Ok with KGC #12 Han Song-Yi in the MB position.