Sharingan ,
Zabuza seeing that eye said'' through that eye you have been able to copy different jutsu giving the name copy Ninja or Sharingan no Kakashi '' his voice was drifted through who knows where
Seeing this Kakashi said '' his target should be me''
but during this time Zabuza was suddenly in between children and Tazuna-san seeing this Kakashi was cool and was about to attack but suddenly he was amazed as Sakura kicked toward Zabuza but that kick went passed it , indicating it being clone ,
In truth , Shikai who was inside Sakura was fear-full , In anime it showed that this was clone but this is real life so he acted fully through instinct
after Zabuza's clone was distroyed he was seen behind Kakashi swinging his blade but Kakashi being kakashi avoided that attack and kicked Zabuza toward the water similarly Zabuza too dragged Kakashi into the water and trapped him into a water ball .
THEN he looked toward Sakura and said '' how was she able to react to that, almost at entry of chunin'' hearing this Kakashi was even more socked as he knew Sakura wasn't Chunin but just Genin
during this through the original concept Naruto saved Kakashi through deception and Kakashi landed a blow to Zabuza .seeing Zabuza was unconscious he was about to kill Zabuza ,
then suddenly came a young figure throwing needle toward Zabuza killing him , Kakashi seeing the Anbu character let that figure take away Zabuza but later said that he might be helping Zabuza .
during this fight Shikai was aware of his time for sending information to main body , so he sneaked out to the tree made another shadow clone and dispelled giving the information about the fight to main body and again hide under Sakura's shadow
Kakashi was troubled after the fight about how Sakura was able to react , the feeling of being spied on since the beginning and, small chakra fluctuation from time and again, Hence did a check to Sakura with Sharingan but didn't find any defect , and finally they arrived at the land of wave where he taught the 3 children how to use chakra to walk in tree and water.
But , Shikai was really lucky , Previously just as he was about to enter Sakura's Shadow he saw Doubts in Kakashi so he waited a bit and found that Kakashi was observing Sakura with Sharingan so he was full of sweat and thought that it was great save this time. And afterward went to Sakura's shadow.
During the training of 3 children , Under Shadow Shikai got more inspiration on how to perform Chakra extraction which was his plan this time .
As he already know how to use chakra to walk on water during controlling of shadow dive he focused on how to collect chakra inside the body like a water tank.
After the training there were incident of Naruto meeting a beautiful girl who was actually HAKU and Some drama on the employers home but that didn't affect Shikai since he wasn't MR goody like Naruto who can solve all thing by talk-no-jutsu.
In the background there was also story gong where Haku was feeding medicine to Zabuza
and again another story where Gotou was planning to backstab Zabuza and destroy the bridge.
well Gotou was originally the Employer of Zabuza to kill Tazuna so he was disappointed to the failure of Zabuza
now the next morning, there was going to be a fight so Shikai thought if he would help Sakura or not but again thought that if situation needed
the fight started in the bridge where Kakashi Sasuke and Sakura were there but no Naruto because he was in employers home as the official situation
Kakashi was fully busy with Zabuza while showing Sharingan to which
Zabuza said''Sharingan again''
''now you will say same technique wont work me twice''
just after saying this he performed hdden mist jutsu and hide away ,
at this point Sakura was already near Tazuna so , Shikai was also there
then suddenly Zabuza out of no where came behind Tazuna and attacked but seeing this Kakashi speed up knowing that he might get cut but , like the previous situation Shikai survival instinct and for his plan he controlled Sakura's legs , then suddenly grabbing Tazuna the jump toward Zabuza
Shikai managed to use the throwing force from the sword and managed to take Sakura and Tazuna fly away and just barely landed safely but it fractured the Ankel of Sakura which Shikai didn't care .
Seeing all this happened before their own eye Zabuza and Kakashi were so socked and suddenly shouted '' what was that?''
this shout was like a thunderstorm as Zabuza was angry and Kakashi was beyond shock
which even shocked Haku who was playing with Sasuke and Sauske was even angry at himself not being able to solve Haku .
Due to Ankel break Sakura barely maintained her consciousness as this was her first injury and it hurted like hell and the feeling of not being able to control herself made her crazy for once.
In this incident Kakashi wasn't injured as in anime and Zabuza was not ready to deal with uninjured Kakashi but the fight was unavoidable
Back toward Naruto after solving the men left behind by Gatou and through Talk-no-jutsu convincing grand/children of Tazuna was rushing toward the bridge and didn't knew the heroic performance of Sakura.
Now in this situation where Sakura can't even stand Shikai was in dilemma thinking how to get near Haku as Haku was the main goal this time and all depend on if Haku act as same in anime
Thinking all this Shikai made a bold decision of going himself as in shadow through under the bridge so he attached himself to another shadow near Sakura which was the shadow of wood , and slowly started to move toward Haku
But this small incident greatly alarmed both Kakashi and Zabuza who were thinking the performance of Sakura so both of them were wide awaken and tried to sense the chakra
Noticing that he forgot to cover his chakra movement while traveling Shikai hurriedly cover up his chakra , But this surely didn't help as both jounin were searching for him so he stayed under radar and slowly came to Haku and finally attached to his shadow .