
You can't arbitrary to bought it, You have to buy with same as your Class
Saber
Default servant / character: okita musashi
mordred
nero
salter
altera
barghest
Archer
Default servant / character: gilgamesh atalanta
tomoe
zenobia
emiya
nobu
arash
Lancer
Default servant / character: karna scathach
ereshkigal
lalter
cu
parvati
leonidas
Rider
Default servant / character: medusa martha
ishtar
drake
astolfo
medb
ushiwakamaru
Caster
Default servant / character: skadi tamamo
sanzang
davinci
merlin
murasaki
scheherazade
Assassin
Default servant / character: semiramis shuten
yu
osakabehime
kama
jack
stheno
Berserker
Default servant / character: raikou kiyohime
nightingale
morgan
heracles
frankenstein
lancelot
Ruler
Default servant / character: jeanne artoria
astraea
himiko
jeanne1
martha1
amakusa
Avenger
Default servant / character: jalter gorgon
maounobu
dantes
jalter1
ushiwakamaru1
kama1
Moon Cancer
Default servant / character: bb bb1
kiara1
jinako
kiara3
bb2
bb3
Alter Ego
Default servant / character: kiara kiara2
meltlilith
passionlip
okiter
kiara4
kingprotea
Foreigner
Default servant / character: hokusai abigail
koyanskaya
hokusai1
yang
jacques
voyager
Shielder
Default servant / character: mash mash1
mash2
mash3
mash4
mash5
mash6