しかし => But, nevertheless N5
Change the subject of the story
もしかすると/もしかしたら~かもしれない => perhaps; maybe; perchance; by any chance ~ N3
しかしながら => however, nevertheless N2
Things do not match the prediction
もしかしたら…か => perhaps; maybe; perchance; by any chance ~ N4
Speculation
...し, ...し, ...から => and; and what's more ~ (emphasis) N4
Line up, list
~かくして => thus... N1
Conclude
かしら => I wonder (feminine) N4
…し, …から => Because... moreover... so... N4
Cause, reason
たしかに/なるほど~かもしれない => might; perhaps N3
Speculation
もしかしたら => perhaps; maybe; perchance; by any chance ~ N4
にしてからが => Even... N1
Demonstrate by example
いつしか => before one knows N2
Accept, agree