I observed something like how both Ishu and ruhi are each other'so savior and protector
Today when shaguniya was about to slap ruhi Ishu stopped her and scolded her
Then later in room when toshiji put her hand on Ishu cheek ruhi came running like sensing her mother would be in trouble yelling not to hit her mother in her little stern voice
I really loved this little scene both ruhi and Ishu are totally soul of each other both can sense their troubleness